Whether you grow a whole bed of strawberries or just a few potted plants, replenishing the soil nutrients each spring ensures the strawberries remain productive every year. New plants require fertilisation both at spring planting and a second application later in the spring, while existing plants benefit from a late winter or early spring treatment. Fertiliser application in spring is light, as too much leads to excessive foliage growth but few berries.
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Things you need
- 10-10-10 fertiliser
- Ammonium nitrate
Spread 1.81kg. of 10-10-10 analysis fertiliser over every 100 square feet of new planting bed. Apply this fertiliser in spring, approximately three weeks before setting the new strawberry plants in the bed.
Apply 0.68kg. of nitrogen fertiliser, such as ammonium nitrate, in late spring one month after planting if the strawberry foliage appears yellow or weak. Work the fertiliser into the top 3 inches of soil between the plants, but don't get it directly on the foliage as fertiliser can cause burning.
Fertilise established strawberry plants in late winter or early spring. Apply either 0.68kg. of ammonium nitrate or apply 1.13kg. of 10-10-10 analysis fertiliser per each 100 square feet of bed.
Mulch around the plants with a 2- to 3-inch layer of compost after applying the spring fertiliser. The compost helps retain soil moisture and leaches organic nutrients into the soil throughout the spring and summer months.
Tips and warnings
- Substitute bloodmeal for ammonium nitrate if you prefer to grow organic strawberries.
- Water thoroughly after fertilising. The water helps leach the nutrients into the soil and also rinses any fertiliser splashes from the strawberry foliage so there isn't any burning.
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