I might be tempted to go seedling mix, potting mix, ocean forest. Depending on size.
If you only want one transplant. You can try 50% potting soil, and 50% ocean forest. Even add a little perlite. Just keep your first run simple.
Id get some liquid, organic, soil based bloom fertilizer.
Its only really when they start stretching for flower, that you'll need to hit em, a feed or two.
Soil's a different breed. Everything happens very slowly. A lot of the time if there's lockout in soil, its too late.
Deficiency is easily fixed, in a day or two. You just hit em with fertz
Less is best, in soil.
Watch the pests too. They love soil.
