When and How Should I Feed My Strawberry Plants?

Strawberry feeding requirements shift across the season to match what the plant is doing. A high-nitrogen feed in spring supports leafy growth; a high-potassium feed during flowering and fruiting improves flower set and fruit quality; a balanced feed after harvest renovation supports the establishment of a strong plant for overwintering. Getting the timing and type right avoids the two main fertiliser mistakes — too much nitrogen during fruiting (which produces leafy plants with poor fruit), and no feed at all in containers (where nutrient depletion causes visible decline quickly).

Before planting — soil preparation

Incorporate well-rotted compost or manure at two buckets per square metre before planting. This provides a slow-release nutrient reservoir and improves soil structure. For beds going into a site with poor soil history, add a balanced granular fertiliser as well. Good soil preparation reduces the feeding burden during the season.

Early spring feed

As growth begins in spring (March to April), scatter a balanced granular fertiliser (10-10-10 or similar) around established plants and water in. This supports the initial burst of leaf and crown development. Do not apply a high-nitrogen feed at this stage — excessive leafy growth before flowering encourages disease and can delay flower initiation.

Flowering and fruiting — high potassium feed

From the first flower opening until the last fruit is picked, switch to a high-potassium liquid fertiliser — purpose-made strawberry feeds, tomato fertilisers, and seaweed-based liquid feeds high in potassium are all suitable. Apply as a soil drench every seven to ten days. Potassium supports cell wall strength in fruits (improving fruit firmness and shelf life), flower set, and sugar development. This is the feeding period with the highest return on investment. Container-grown plants are most dependent on regular liquid feeding as they have no soil reserve to draw on.

After harvest — balanced recovery feed

After renovation (cutting back old foliage in late July), apply a balanced liquid or granular fertiliser to support regrowth through August and September. This period of vegetative growth builds the crown buds that will produce next year's flowers. Do not apply high-nitrogen feeds late in the season — this produces soft growth vulnerable to disease and frost.