Growing guide: fresh bare-root strawberry plants
Econome à LégumesFrom summer planting to first harvest, fresh bare-root strawberry plants demand a level of technical rigour that leaves no room for approximation. Unlike cold-stored plants taken out of refrigeration in spring for a near-immediate crop, or tray plants whose flower initiation has already been completed in the nursery, fresh plants commit you to a nine- to ten-month cycle where every technical decision from July through November directly determines your yield the following May.
This is precisely what makes them a demanding yet strategic choice for growers of June-bearing varieties in open field or low tunnel systems. Unit cost is competitive, summer availability allows early establishment, and first-year yield potential is excellent — provided you correctly manage plant establishment, flower induction and winter dormancy. The point at which the production plan becomes selective is exactly within this chain of interdependent decisions that no general guide or standardised technical sheet can resolve for you.
This article covers the full cycle: fresh plant characteristics and comparison with other plant types, establishment management and post-planting water management, then guidance on autumn flower induction, winter handling and first-harvest planning.
Before going into technical detail, here are a few questions that Fraisibot, our specialist strawberry agronomic advisor, regularly works through with growers during the season:
What visual sign confirms that establishment is sufficiently advanced to stop supplemental overhead irrigation and switch exclusively to drip? How should you adjust the irrigation programme between the end of establishment and the start of flower induction without disrupting bud differentiation? And how do you calibrate the first nitrogen application at spring dormancy break without exposing the crop to powdery mildew at flowering?
These decisions depend on your variety, your production system, your field history and your region. Fraisibot supports you at every stage, in real time, based on your specific situation. Discover Fraisibot, your specialist strawberry agronomic advisor.
Fresh bare-root plants: definition, characteristics and position in the range
What is a fresh bare-root plant?
A fresh bare-root plant is a rooted runner lifted while in active vegetative growth, typically between late June and early August at the nursery. It is supplied without growing medium, bare-rooted, and dispatched within 48 hours of lifting. Its defining characteristic is that it is a living plant in full physiological activity at the time of planting, in direct contrast to the cold-stored plant which is in complete dormancy.
This characteristic is simultaneously its main advantage and its primary constraint: a freshly lifted plant tolerates waiting poorly. Every hour post-lifting without water is an hour of water stress that compromises establishment. The window between receipt and planting is non-negotiable — 48 hours maximum under ideal conditions, less when temperatures are high.
Fresh plants are intended almost exclusively for June-bearing (short-day) varieties. The logic is straightforward: planted in July, they have time to root, grow vegetatively through summer, then initiate flower buds in autumn as the photoperiod drops below 13 hours of daylight. They will then fruit abundantly the following spring.
Comparison with other plant types
The choice of plant type is the most structurally important decision of the whole production plan, as it determines the planting window, the time to harvest, the investment level and the technical demands of crop management.
| Plant type | Planting window | Harvest | Indicative yield/plant | Indicative cost | Technical demand |
|---|---|---|---|---|---|
| Fresh bare-root plant | July – early August | Spring Y+1 | 280–420 g | €0.20–0.45 | High (summer establishment) |
| Cold-stored plant (A/A+) | January – August | ~120 days after planting | 250–400 g | €0.20–0.45 | Moderate |
| Tray-plant / Mini-tray | Sept – October / March | ~90 days after planting | 400–600 g | €0.75–0.80 | Moderate |
| Waiting Bed (WB) | August – September | ~105 days after planting | 300–500 g | €0.50–0.60 | Moderate |
| Fresh plug plant | Year-round | Y+1 | 230–350 g | €0.35–0.50 | Low to moderate |
The fresh bare-root plant differs from the tray plant on one fundamental point: flower induction is not completed at the nursery. You must manage it on your own plot, between August and November. This is where the following spring's harvest is either won or lost.
Compared with the cold-stored plant, the economic advantage is similar in unit cost, but the production plan is longer and summer management more demanding. The cold-stored plant is established in spring on an already-vernalised plant — the technical decision-making is concentrated into a few weeks. The fresh plant commits you to nine months of continuous management.
Further reading on specific production plans: Cold-stored strawberry plant guide — Tray-plant strawberry guide
When to choose fresh plants?
Fresh bare-root plants are the right choice when you are growing June-bearing varieties for a spring crop, working in open field or low tunnel systems, cost of establishment is a consideration, and you have an overhead irrigation system to secure summer establishment. They are not recommended if you cannot guarantee regular irrigation through July and August, if your planting window slips past 15 August (risk of insufficient induction before first frosts), or if you are targeting an early crop in the same year — in that case, tray plants or WB plants are better suited.
From receipt to establishment: the three weeks that determine the season's potential
Soil preparation — what must be in place before the plants arrive
The arrival of fresh plants leaves no time to prepare the ground. Everything must be operational at the moment of receipt: cultivated soil, formed ridges, plastic mulch in place, drip irrigation tape installed under the film, and the overhead system ready to run immediately.
Soil cultivation should reach 30 to 40 cm depth to adequately loosen the profile and encourage root development. The strawberry root system is shallow — generally not exceeding 20 to 30 cm — but it is dense and extremely sensitive to waterlogging. Compacted, clay or waterlogged soils must be corrected before planting or Phytophthora cactorum and Pythium are likely to develop with the first autumn rains.
The optimum pH is between 5.8 and 6.2. A pH that is too high (active lime > 3% CaCO₃) causes iron deficiency chlorosis through blocked iron assimilation, particularly damaging on Gariguette which is known to be sensitive to this imbalance. A full pre-planting soil analysis — pH, organic matter, P₂O₅, K₂O, Mg/K ratio — is essential to correct imbalances before establishment. In organic production, incorporating 30 to 40 t/ha of mature compost at least 6 weeks before planting provides a progressive base nutrition and improves soil structure for the full cycle.
Two trace elements deserve specific attention before planting: boron (involved in flowering and fruit set — deficiency causes fruit deformities and unfertilised achenes) and magnesium (chlorophyll and photosynthesis — deficiency visible as interveinal yellowing of older leaves). Where soil analysis identifies deficits, applying 5 to 10 kg B/ha (borax) and 30 kg MgO/ha (magnesium sulphate) before planting corrects these imbalances durably.
Ridges (15 to 20 cm high, 60 to 80 cm between centres) improve drainage, warm up the soil more quickly and aid thermal recovery after winter. The plastic mulch film, laid over the ridges, limits evaporation, prevents weed development and keeps fruit clean at harvest. The drip irrigation tape — with emitters spaced 20 to 30 cm apart on the line — is positioned under the film, at the centre of the ridge, before the mulch is laid.
Receipt and planting — the steps that secure establishment
At receipt, immediately check plant condition: roots white to slightly ochre, crown tissue firm, no mould or fermentation odour. A fermented or desiccated plant will not establish.
Before planting, rehydrate the roots for 15 minutes in fresh water to restore turgidity. Trim roots to 10 cm if excessively long, to prevent them curling back in the planting hole — a root that doubles back in the soil does not colonise the profile correctly. Partial trimming of large leaves reduces evaporative demand during the first days and relieves the plant while new roots are establishing.
Planting is carried out with the crown strictly at soil surface level — neither buried (risk of crown rot from Phytophthora cactorum) nor exposed (desiccation of exposed roots). Standard spacing in open-field ridged systems is 25 to 30 cm within the row, with single or double rows depending on target density (33,000 to 50,000 plants/ha in single row, up to 80,000 in close double rows under cover).
Immediately after planting, a thorough watering firms the soil around the roots and eliminates air pockets — this is the most important action in the first few minutes.
A final preparation point that is often underestimated: crop rotation. Replanting strawberries on a plot recently under strawberries, or on a plot with host plants for soil-borne diseases (Solanaceae — tomatoes, potatoes, aubergines — for Verticillium dahliae; crops susceptible to Phytophthora) is one of the most costly mistakes in the production plan. A minimum interval of 6 to 8 years on the same plot is recommended — and up to 20 years where there is a history of Phytophthora infection. For a fresh plant whose root system is still fragile in early summer, a soil carrying a heavy telluric inoculum can compromise establishment before the problem even becomes visible.
Establishment water management — transitioning from overhead to drip irrigation
Summer establishment is the most critical period of the entire production plan. The fresh plant, coming from the nursery, must rebuild its root system in warm soil, under temperatures that can exceed 30 °C. Evapotranspiration demand is at its peak, and the plant does not yet have active roots to meet it.
During the first 15 days, fine overhead irrigation is the primary irrigation method. It cools the foliage, limits desiccation and maintains a very low soil matrix potential, between 5 and 15 kPa — corresponding to soil virtually at field capacity throughout. Frequency is daily, or several times a day during heatwave conditions, with applications of approximately 4 to 6 mm per day (0.3 to 0.5 L per plant). Early morning and evening hours are preferable to limit evaporation.
The transition to drip irrigation only occurs when active rooting is confirmed. Visually, the signals are clear: appearance of new, shiny trifoliate leaves (BBCH stage 10-19), beginning of runner emission, plants showing no sign of wilting during the hottest part of the day. Instrumentally, the transition is validated when the crop can tolerate a slightly higher matrix potential, between 10 and 20 kPa, measurable via Watermark-type tensiometric probes positioned at 15 to 20 cm depth in the root zone.
This transition is gradual — overhead irrigation is not stopped abruptly. Overhead passes are spaced further apart, plant response is monitored, and the definitive switch to drip takes place once roots are visibly active and plants no longer show stress during hot periods.
The complexity of this management — tensiometric thresholds to adjust according to soil texture, variety, aspect and current weather conditions — illustrates clearly why no standard irrigation programme can substitute for a decision adapted to your specific situation. Fraisibot answers your questions about strawberry water management in real time, directly from your plot. Access all our specialist agronomic AI advisors.
For detailed guidance on in-season water management: Strawberry irrigation: requirements and management
Key risks with sensitive varieties
Not all varieties respond to summer establishment in the same way. Gariguette is well known for its low initial vigour — establishment losses can reach 10 to 15% in poor overhead irrigation conditions, particularly with late plantings (after 20 July) in regions with hot summers. Its sensitivity to Phytophthora cactorum also makes it more vulnerable on poorly drained ridges with excessive watering at the start of establishment. Elsanta, more vigorous, establishes more reliably but remains sensitive to heat spikes during the first two weeks on light sandy soils with low water-holding capacity. Ciflorette and Cléry generally offer better robustness at summer establishment, making them more forgiving varieties for growers new to this type of plant material.
An establishment rate below 85% three weeks after planting should trigger an investigation: regularity of overhead irrigation, plant quality at receipt, soil condition (pH, drainage), field history. Replanting gaps with cold-stored plants of the same variety remains possible until mid-August, provided the same irrigation quality is maintained as during the original planting.
Autumn and winter: managing flower induction and preparing for first harvest
Flower induction — the invisible process that determines everything
Flower induction in June-bearing varieties is an entirely internal mechanism, with no visible sign on the plant. It is triggered when two conditions are simultaneously met: a photoperiod below 13 hours of daylight and temperatures below 15–18 °C. In metropolitan France, this window generally opens from late August in the Centre-West and South-West, extending through November as long as temperatures remain above 7 °C.
In practical terms, it is during this period — often two to six weeks depending on region and variety — that each plant determines the number of flower trusses it will produce the following spring. A plant that enters this window in good vegetative condition, with established root reserves, free of stress and nitrogen excess, will initiate a high number of flower buds. A stressed, nutrient-depleted, or conversely over-vigorous plant due to excess late-season nitrogen will initiate fewer buds — and the May harvest will be directly affected.
The three levers that determine induction quality
1. Runner removal before the induction window
Runners directly compete with the mother plant by drawing water, minerals and assimilates away from it. Their systematic removal throughout summer — with weekly passes using secateurs or scissors — is essential to concentrate all resources on flower bud differentiation. The impact is measurable: systematic runner removal results in a yield increase of +15 to +25% on first harvest depending on varietal vigour. This is one of the highest-return crop management operations in the entire production plan.
As October approaches, the first autumn flower trusses that may appear on some plants must also be removed. These late flowers, unproductive as they cannot reach maturity before the frosts, uselessly drain the reserves the plant needs to build for winter and for the following spring's flowering. Removing them systematically redirects energy towards root reserve accumulation.
2. Nitrogen nutrition management
Nitrogen is the most critical nutritional parameter during the induction period. Excess nitrogen application at this stage produces lush, watery, tender vegetation and directly impedes flower bud initiation: the plant remains in vegetative mode rather than switching to floral differentiation. The nutritional imbalance also generates increased susceptibility to powdery mildew and Botrytis, the consequences of which will manifest from the following spring onwards.
The rule is simple: from October onwards, stop all nitrogen applications and switch to phosphorus-potassium inputs to support reserve accumulation. In practice, a potassium-rich fertiliser (such as potassium sulphate) applied before dormancy entry supports the quality of buds formed and prepares the plant's winter hardiness.
Pay particular attention to poorly mineralised organic amendments: an application of compost or manure that is insufficiently decomposed in late season can release nitrogen progressively during autumn, with exactly the same disruptive effect on induction as a direct mineral application.
3. Maintaining soil moisture
The flower induction period must never be a period of water stress, even if visible foliar water demand appears modest in September-October as temperatures fall. The target matrix potential remains between 10 and 20 kPa — soil consistently moist, neither too wet nor too dry. Even brief soil drying in August-September can compromise the number of flower buds initiated without this being visible on the plant at the time.
Water requirements gradually decrease from October onwards as temperatures fall and growth slows. Irrigation inputs are reduced accordingly, to accompany natural dormancy entry — without allowing the soil to dry out.
Dormancy entry and chilling requirements
From November onwards, when temperatures regularly drop below 5 °C, the strawberry plant enters dormancy. Leaves take on a reddish tint, growth stops, and the crowns progressively harden in the cold — this is the acclimatisation process that allows the plant to tolerate intense frosts (down to -10 °C on an established plant, lower still under snow or mulch).
Satisfying chilling requirements is a non-negotiable condition for abundant, synchronous flowering the following spring. These requirements vary significantly between varieties:
- Gariguette: approximately 800 hours below 7.2 °C — high chilling requirement variety, unsuitable for Mediterranean regions without altitude
- Elsanta: similar requirements, Centre-West and northern lowland zones
- Ciflorette, Cléry: intermediate requirements, more flexible across the South-West zone
- Limvalnera, Festival: low chilling requirements, suited to Mediterranean regions and early forcing
In late autumn, before the first severe frosts, carry out senescent foliage removal: cut old leaves to 5 cm above the crown without damaging the central buds. This significantly reduces winter fungal inoculum (powdery mildew, Botrytis on dead leaves) and stimulates the emergence of new, healthy foliage in spring. On large areas, a high-set rotary mower can replace manual work — with care not to damage the crowns.
Mild winter: diagnosing and compensating
An insufficiently cold winter is one of the most difficult agronomic risks to manage with high-chilling June-bearing varieties. Signs of poorly broken dormancy only appear in spring, but are then clearly identifiable: weak vegetation with very short petioles, aborted flowering, deformed or absent flower trusses, and highly variable production from one plant to the next along the same row.
The compensation strategy in open field or low tunnel systems rests on a simple principle: expose the plant to low temperatures for as long as possible, even if this delays the start of the season. In practice, this means:
- Delay closing low tunnels and laying P17 fleece as long as possible — every additional day of exposure to outdoor cold contributes to the accumulation of chilling hours
- Defer the restart of irrigation and the first nitrogen application at dormancy break until thermal conditions are genuinely satisfied — restarting irrigation too early in a mild winter can stimulate vegetation that has not met its chilling requirement, resulting in delayed and unproductive flowering
- Do not confuse apparent bud swell with genuine dormancy break: a warm day in January can cause slight bud swelling without vernalisation being satisfied
In the event of a notoriously mild winter (as in the 2023-2024 season across many French regions), anticipate a potentially reduced yield on high-chilling varieties, and reinforce dormancy-break interventions (fertilisation, protection against late frosts which often occur as soon as vegetative growth restarts on poorly vernalised plants).
First harvest: stakes and management
The following spring's harvest is the exact reflection of the quality of autumn flower induction. The number of viable trusses initiated between September and November determines the volume of the first flush of harvest — and there is no technical lever available in spring to compensate for insufficient induction.
However, several spring decisions can either preserve or dissipate the potential built up in autumn. The critical intervention stages are as follows:
Vegetative regrowth stage — March, BBCH 10-19
Gradually restart irrigation as new leaves appear, and apply a modest nitrogen fertilisation: maximum 20 to 30 kg N/ha, split over two applications. Excess at this stage prolongs the vegetative phase at the expense of fruiting and renders tissues tender and particularly exposed to powdery mildew (Podosphaera aphanis). The tolerance margin is narrow: symptoms of excessive nitrogen at regrowth (lush foliage, long petioles, very green plants) translate within the first weeks of flowering into increased fungal pressure.
Flower bud appearance stage — April, BBCH 55
This is the trigger for absolute frost protection. As soon as flower buds are visible in the crown, any night forecast below -0.5 to -1 °C justifies intervention: P17 fleece as direct cover, or continuous overhead irrigation if the system is in place (overhead irrigation releases latent heat during frost events and protects flowers down to -4 to -5 °C depending on conditions). A late frost on open buds can destroy the entire yield potential within a matter of hours.
For complete guidance on frost management at flowering: Late frost in strawberries: protecting flowering
Flowering and fruit set stage — May, BBCH 60-71
Irrigation must become perfectly regular: 3 to 5 mm per day, matrix potential maintained between 10 and 15 kPa, with no wetting of flowers (drip irrigation is essential at this stage — overhead application to open flowers degrades pollination and promotes Botrytis). Fertilisation shifts towards potassium and calcium to support fruit set and berry quality. Under tunnel or cover, verify the active presence of pollinators — one bumblebee hive (Bombus terrestris) per 1,500 to 2,000 m² provides adequate pollination cover in enclosed conditions.
Fruit development stage — BBCH 72-79
Peak water requirement: 5 to 8 mm per day in hot dry conditions. Water stress at this stage directly reduces final fruit size and Brix — a strawberry does not recover size lost during development. Conversely, excess water at the end of development dilutes sugar content and weakens post-harvest fruit firmness. Monitor closely for two-spotted spider mite (Tetranychus urticae) which proliferates under cover in hot dry conditions, and for early Botrytis cinerea attacks on petal debris lodged against the achenes — these floral remains are one of the fungus's preferred entry points on developing fruit.
For guidance on irrigation management during periods of intense summer heat: Heatwave and strawberries: adapting irrigation
When the standard production plan is no longer sufficient
A technical guide, however detailed, addresses average situations. In the field, you manage specific situations — and that is precisely where decisions become difficult.
Tolerance to water stress during establishment is not the same between Gariguette and Elsanta. The former, with its low vigour, can lose 15% of its plants in conditions that allow Elsanta to establish at 95%. What matrix potential threshold should you apply in your case, on your soil, with your overhead configuration?
The flower induction window does not fall on the same dates depending on whether you are working in Nouvelle-Aquitaine, Brittany or Isère. In Atlantic Brittany, a cool summer can bring induction forward by two weeks compared to the Gironde. Should you adjust the runner removal programme, the schedule for final nitrogen applications, and the date for stopping irrigation accordingly?
A mild winter after a fresh plant establishment raises questions that the regional technical bulletin cannot answer on an individual basis: should I keep my tunnels open until February even if neighbouring growers have already closed theirs? When should I restart dormancy-break irrigation without risking early vegetation from plants that have not met their chilling requirement? The answer depends on your actual accumulated chilling hours, your variety, and your field history.
Finally, the nitrogen tolerance margin at dormancy-break fertilisation is one of the narrowest in the entire production plan. Too little nitrogen, and regrowth is slow with under-expressed yield potential. Too much nitrogen, and powdery mildew susceptibility rises from the onset of flowering, with watery fruit. Between the two, the right dose depends on your soil type, your previous season's inputs, and the visual condition of your plants coming out of winter.
These are precisely the decisions — those that cannot be standardised — that Fraisibot works through in real time, based on your situation. Access agronomic advice tailored to your operation, available 24/7 with no appointment or travel required — that is what our specialist advisors offer. Access all our specialist agronomic AI advisors.
Conclusion: nine months of management for a secured harvest
The fresh bare-root plant production plan is technically coherent and economically sound for growers of June-bearing varieties who master the full cycle. Its strength is enabling summer establishment at controlled cost — €0.20 to 0.45 per plant, comparable with cold-stored plants — with a spring yield potential of 280 to 420 grams per plant under good management conditions. Across 3 hectares at 40,000 plants/ha, the yield gap between a well-managed flower induction and a compromised one can represent several tens of tonnes of strawberries in that first harvest.
July establishment demands precise overhead irrigation and tensiometric monitoring to secure rooting. Summer and early autumn require systematic runner removal — whose quantified yield impact (+15 to +25%) makes it an absolute priority — and strict control of nitrogen inputs to prepare a quality flower induction. Autumn and winter require dormancy management and careful tracking of chilling hour accumulation to avoid compromising vernalisation. And spring calls for precise interventions at key BBCH stages — moderate fertilisation at regrowth (maximum 20 to 30 kg N/ha), frost protection from BBCH 55 (critical threshold -0.5 °C on open flower buds), regular irrigation without wetting flowers during flowering.
At each stage, decisions depend on your variety, your soil, your region and the season's conditions. That is the limit of any general production guide.
Fraisibot, our specialist strawberry agronomic advisor, answers your technical questions in real time, based on your specific situation — from planting through to harvest. Discover Fraisibot and secure your crop management decisions. To access the full range of our specialist advisors by crop: All our agronomic AI advisors.