Question. What about crop rotation. I presume the first year would be fine, but will the soil need major amendments so as to be supportive of the same crop spring and fall? What/how do I amend? If rotation is recommended, what might you recommend to rotate with it, preferably that is tall and/or vining? Or, is this not a worry. Seems years ago I grew tomatoes great one year, and never again.

Thanks!!!

Given those dimensions are you sure about the gallon size? Normally a 24" diameter 18" deep pot will hold approx. 38-40 qt. of potting mix or 8-10 gallons. It's dry mix vs. liquids.

Either way they are big enough for a single tomato plant but be sure to use a soil-less mix, not soil in them. That is standard for containers regardless of size.

Normally one doesn't "rotate crops" with containers. Instead you just refresh the mix in the containers between plantings. Not that you can't rotate - you can of course but it normally isn't necessary. If you do just don't plant things from the same family - tomatoes, potatoes, eggplant. Instead plant leafy greens, squash, even peppers.

You can learn all the details on container growing including make-you-own mix recipes and how to refresh it the following year over on the Container Gardening forum here. Look at the posts for the 5-1-1 mix and be sure to check out all the discussions on feeding container plants as well. Linked it below for you.

Dave

I just checked the containers, and they are stamped #25 27.50 gallons / 104.10 liters. They are measured correctly, as to what the stamping denotes, I don't know!

I will investigate the soilless mixes. I am familiar with mel's mix, don't know if this is what you are referring to, but i will check out the 5 1 1 mix. At first thought, throwing out that much mix each season seems too wasteful, so rotation may be my answer, or amending. I am sure I will learn more over there, too.

Thanks for the input!