Answer: Most all vegetables will adapt to growing in containers. You'll need 12-18 inch deep containers for your collards and tomatoes and only 6 inch deep containers for your lettuces. Since the roots of your plants are contained the best way to fertilize is by using a half strength dilution of water soluable fertilizer such as Miracle Gro and feeding every 2-3 weeks. This way your plants will have an almost constant source of nutrients without the possibility of overfeeding and burning the roots. Best wishes with your garden!
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