I have tomatoes with green shoulders from time to time. Maybe someone with more knowledge will help out here. For example, this year I have some Rutgers growing. The bottom 2/3 is red, and the top 1/3 is green.

Some of what you have in that picture looks like sun scald. But if you have green shoulders, that can be due to too much heat. The heirlooms are more susceptible to this. Ripping out the plastic may help.

Thank you! Thank you! I'll look up sun scald. I forgot to mention I have basil and lavender growing in the same soil getting about the same amount of water... They are thriving. Don't know if that helps any.

are you giving it any fertilizer? certain minerails that are absent can cause uneven rippening and your inter curled leaves, the main one is potassium. magnesium will also cause tomatoes to have "green back" but you will get a different looking leaves.

Maybe not enough fertilizer. I'll try that too. Thanks!

Your plant is obviously highly stressed so there may several things going on with it. Sun scald, tomato leaf roll, etc.

If you Google 'green shoulders' you'll find much more info. But basically green/yellow shoulders is primarily caused by high temperatures. The chlorophyll in the shoulders is slow to break down and results in a patch that remains green or turns yellow but not red.

Providing some shade for the plants and especially the the fruit helps and can reduce the sun scald too. You can also pick the fruit at color break instead of leaving it on the plant and let it finish ripening indoors to eliminate the problem.

Dave

The normal color progression is green to yellow to orange to red. If you get tan patches, it's sun-scald.