I read your article about fertilizing tomatoes before planting and about 6 inches, but it didn't mention about tomatoes in hanging baskets. Could you be specific on this?
What’s the Best Way to Fertilize Hanging Basket Tomatoes?
Certified GKH Gardening Expert
For plants in containers, I recommend a slow release fertilizer (like Osmocote) on top of the soil, if using chemical fertilizer. If you are organic, when you mix the soil for the container, mix in a good amount (maybe 1:3 or 1:2) of compost to soil. A little bit of rotted manure is good as well, but not too much as that will cause big plants with few fruit.