Help with Strawberries

[mweather]

I hope this is the correct place for this question.

I just planted some stawberries in raised bed planters. It is 90% miracle gro potting soil with some topsoil mixed in at around 10% of the mix.

Any idea what would cause my berries to turn out like this? Ph? Moisture? fertilizer?

The plants overall look health just the berries look this way. I suspect it is something I'm doing as I've planted them in the past with similar results.