How to Fertilize Capsicum annuum 'Serrano'?
Tomato or pepper feed every one to two weeks in fruiting season

Capsicum annuum 'Serrano' · Capsicum annuum 'Serrano'
Best grown inside on a sunny windowsill or in a greenhouse, but can be grown outside once all danger of frost has passed; select a sunny, sheltered position and grow in containers, growing bags or in open ground. Water regularly and feed with a high-potassium, liquid fertiliser once the first fruit has set. See How to grow: chilli peppers for further cultivation details
Tomato or pepper feed every one to two weeks in fruiting season