breaking the top off of an indeterminate plant does not render it worthless at all! it will do exactly what you said it will do and put off another stem...or several.

"Our plants are indeterminates and are in 7.5 gallon containers is this too small?"
The consenus is that indeterminates should be grown in 5 gallon containers or larger. I believe the larger the better, however there is one grower here who has great success with 4 gallon containers.

"My brother thinks hes a know it all and broke off a few tops today when wrapping twine he is under the impression if the top is broken off the plant is pretty much worthless and wont produce anymore...who's right?"
You are right. However, you mentioned that most plants have been pruned to 2 main stems. Because the suckers have been removed you'll have to wait for new ones to form and grow and produce. In other words yes you'll still be able to get fruit but its going to take a while.

"Our plants are about 6 feet tall and have roughly 20 tomatoes of 4-6 oz size we are experiencing some blossom drop from the top flower sets is the plant getting exhausted?"
No, I don't think so. :-) Several factors cause blossom drop. Usually it is because it is too hot, too cold, or too humid. Also since the plants are in a greenhouse has the air circulation situation changed? Tomatoes have perfect flowers, but still need a bit of assistance in the form of movement (wind) or vibration (bees) to increase pollination and fruit set rates.

Good luck.

Randy

You must have a different Sweet Cluster than the variety I'm growing because mine only reach large cherry tomato size, they never reach one oz. size.

Your goal of 30 lb of fruit is realistic for a larger tomato. I just never thought my cherry tomatoes would yield that high. Expect lots of tomatoes but even if you extend your plants to 18 feet high (3 * 6')and they produce 20 tomatoes each 6 feet you will get a yield under 19 lb on average. If they are indeed a cluster tomato then you also have some culling loss if you plan to cut the clusters for sales. There are always some unripened fruits in a cluster end.

I can almost picture your operation. It is very appealing idea with lots of profit potential if you have a market. One concern I have is how you intend to lower the stems when plants grow out of reach. Lowering a stringline supported plant from a bucket may be a bit of a problem. Why aren't you just planting that many plants in the soil? I would forgo the expense of 3000 buckets and all that labor and special care concerns.

I'd appreciate hearing how this all pans out.

bmoser quote:

"I'd appreciate hearing how this all pans out.Z"

m, so would I. :)