Frost Has Damaged My Strawberry Flowers — What Now?

Discovering that strawberry flowers have the characteristic "black eye" of frost damage — the central receptacle and pistils have turned dark brown or black while the white petals remain intact — is a significant blow when you were expecting a good crop from those trusses. Frost kills the reproductive structures in the flower centre while the petals, which are less sensitive, may survive and continue to look superficially normal. A flower with a blackened centre cannot set fruit. Understanding what has been lost, what may recover, and how to protect next year's crop is the key response.

Assessing the damage

Check flowers across the bed — not all flowers in a truss open simultaneously, and flowers that were still in bud at the time of the frost may be protected by the petals and may have survived. Open flowers are the most vulnerable; tight buds are more protected. Look at each flower's centre: a brown or black "eye" where the green dome of receptacle should be indicates dead pistils. White or pale green centres are healthy. Tally the proportion of open flowers affected — if only a third were open and damaged, you may lose some but retain a significant proportion of the crop from later-opening flowers in the same truss.

What to do with frost-damaged flowers

Leave damaged flowers in place — do not remove them. They will still fall naturally, and removing them risks damaging the surrounding healthy buds. The remaining undamaged flowers in later trusses will still produce fruit normally. Feed the plants with a balanced liquid fertiliser to support the remaining healthy flowers and new growth. If a whole truss was exposed and all open flowers are damaged, the loss from that truss is complete — but flowers in different trusses on the same plant open at different times, so total crop failure from a single frost event is less common than it might seem.

Protecting flowers next year

Monitor weather forecasts during the peak flowering period (typically late April to mid-May in the UK). When temperatures below 0°C are forecast overnight, drape garden fleece (15–20 g/m²) loosely over the plants before dark and remove it in the morning when temperatures rise. One or two layers of fleece raise the temperature underneath by 2–4°C — sufficient to prevent damage in most light frost events. For container strawberries, move them into an unheated shed or garage on frost nights during flowering.