If you have lots of tomato flowers but no fruit, it might be caused by inadequate light, too little water or inconsistent watering, too hot/cold (temps above about 75F night/90 day), or not enough pollinators. Too low humidity can also affect pollination; ideal is 40 to 70 percent. If humidity is too low, misting the plant can help pollen to stick. As to indeterminate/determinate: If you don’t know the name of the variety, take a look at the flower clusters. Determinate varieties form flower clusters at the tips of the shoots (a flower cluster will also eventually form at the top of the plant, at which point plant growth stops). Indeterminate plants form flower clusters along the stem.
If you have lots of tomato flowers but no fruit, it might be caused by inadequate light, too little water or inconsistent watering, too hot/cold (temps above about 75F night/90 day), or not enough pollinators. Too low humidity can also affect pollination; ideal is 40 to 70 percent. If humidity is too low, misting the plant can help pollen to stick. As to indeterminate/determinate: If you don’t know the name of the variety, take a look at the flower clusters. Determinate varieties form flower clusters at the tips of the shoots (a flower cluster will also eventually form at the top of the plant, at which point plant growth stops). Indeterminate plants form flower clusters along the stem.