Is better draining soil in pots needed for growing my vegetable garden in? (As Im use to be American living in Ohio)
a good rule of thumb to remember is chemical foods are fast acting and need to be repeated more often, all natural foods are slow release and last longer....chemicals suck------fox farm is great.
If you're using potting mix, you don't need to ad vermiculite. The texture will be fine for containers. The nutrients last months. Most fox farm soil products use bat guano for the fertilizer. There's no precise calculation. I'd say, 2-6 months. If you're concerned about precision, you can always test the soil after 3-4 months. I start feeding my potted plants about 6 months after potting them up with fresh soil, as they never seem wanting in the period, and I'm a tightwad with my additives. For things growing in the ground, I add compost once a year. Twice for certain heavy feeders.