Claud,
A skilled tomato grower in Florida and I have been comparing notes on growing our tomatoes in patented Earthboxes, and in our homemade eBuckets (5-gallon buckets with a built-in reservoir and a wick, like the Earthbucket design). We've both come to the conclusion that there is not enough lateral room in an Earthbox to properly grow more than one huge indeterminate heirloom at a time, and there is definitely not enough lateral room in a 5-gallon bucket to allow the root system to develop properly and produce the HUGE fruit we expect.
My first two seasons as a veggie gardener, I produce humongous heirloom indeterminates, larger than the palm of my hand (beginner's grace!). When I ripped the plants from the EBs at the end of the season, I took note of the root systems and made an interesting observation. The rootspread grew laterally anywhere from 11-15" but only grew vertically to a depth of about 8-11". My theory is that these tomatoes will do best in a shallower but WIDER container, thereby giving them adequate room to spread out laterally.
I'm looking for a planting vessel that is at least 12-15" circumference from center starting from the middle up, with a depth of at least 18-20". I need a 18-20" depth because whatever I use for the wick will raise the soilbed, and I'll need to add that height to the 11" maximum vertical growing space in the soilbed.
I'll be testing our theory this season when I plant out my new seedlings starting (hopefull) this weekend! LMK what you think of the theory.
Here's the spec for our eBucket design. The overturned colander is the best wick design to date, and the plants are growing like gangbusters!
Linda