Multiple plants in container=more fertilizer?
Due to space I'm doing container gardening; some are in Island Grow Pots, but I also have one of those suncast upside-down planters, where you can plant vines out the bottom and herbs or other things on top.
I haven't been really happy with the growth in my containers...in the last three weeks since things have been planted, it doesn't seem like they've grown much. That could be to blame on the cloudy and wet weather we've had here.
In any case though, most frustrating is my upside-down planter. The tomatoes (San Marzano, Boxcar Willie, and Brandywine Black) don't seem to be growing much. I sprayed fish emulsion on everything last weekend, which caused the San Marzano to go crazy--but the others are suffering from some purple leaves/veins (there is some green growth though).
These tomatoes grow out the bottom and on top I have basil plants, oregano, thyme, sage, and parsley. None of those are really growing well, and seem to be in a holding pattern.
In a container like this that has many multiple plants, is the need for comprehensive fertilization greater? Thank you for any input.