How can I grow sweeter strawberries?

7 Tips To Growing Sweet Strawberries

Maybe. Check and see if the PH of the soil is optimal for what you want.

Try a fertilizer with a high P and K, but not high in nitrogen.

I know I’m being irrelevant and unhelpful, but when I read this question I thought it said
“How can I grow sweeter?” and janbb, you just can’t.

@susanc Then dang it – how can I grow more sour?

a) Try a sunnier, warmer location. Microclimates can make a difference.
b) As @Adirondackwannabe said, give it more phosphorus (P) and potassium (K), but don’t overdo it.
c) Try a different variety. Some are more naturally suited to your environment than others. Also, some varieties are naturally sweeter.
d) Cut back some of the runners. Don’t let it go wild.

@janbb – hmm. I’ll have to think hard about how I achieved my own current state of sourness and get back to you.