Hi Billy,
If you have a couple pictures of your plants it would be helpful, both full shots and close-ups of leaves and flowers. Do you know what varieties you planted, or know anything general about them? Are you getting any fruit at all or do the flowers all simply drop? This is certainly unusual since you should have been getting fruit for at least a month now.
There are a couple likely possibilities. The first is that your plants are getting too much nitrogen. Tomatoes are sensitive to nutrient imbalances, and high nitrogen would cause a lot of foliage growth (usually a lighter green than normal, but that would be difficult for you to tell without a normal plant for comparison) while causing the flowers to drop without setting fruit. Do you add your own compost? If compost has a high nitrogen/carbon balance, your plants can get too much nitrogen. This is common when people compost their kitchen waste because fruits and vegetables typically have a lot of nitrogen.
A second possibility is that the temperature is causing flowers to drop. This can occur when nights are cool (below 55F) or when days are hot (above 95F), both of which I would guess are common in your area. Nevada also has a fairly short growing season, so if you are growing late-ripening varieties, the timing may have overlapped poorly with the cool nighttime temperatures you've been having.
Since you planted them in May and they're still growing and flowering well but have little or no fruit, I think Nitrogen is the most likely cause. Unfortunately it may be too late in the season for you to get any fruit from any flowers that haven't set yet. The best thing may be to get a basic soil test; information can be found here http://www.unce.unr.edu/publications/.... If it is nitrogen, you could try to alleviate the problem this year, and definitely next spring, by mixing more carbon-rich material into your soil such as chipped leaves or mulch. There are a lot of resources online for how to make compost with a proper C/N balance.
over 8 years ago.