My guess is they’re too hot or getting too much sun. Looks like they’re getting slightly roasted
HeightAquarius
Maybe there’s residual tomato virus of some kind in the greenhouse that reinfects? Are you reusing the soil and/or pots?
Sativa_stoner_222
I bought bell pepper seedlings from the store and after I transplanted them the leaves looked the same way
Additional_Engine_45
My first guess is magnesium deficiency. Easy fix, water in epsom salts at 1 teaspoon per gallon.
Also could be a phosphorous def but that typically manifests as purple veins not purple interveinal coloration. Maybe hit with fert a few more times at normal rate- be careful because too much N will lead to over vegetative growth with less flower and fruit
Disastrous-Mix1619
it looks like a phosphorus deficiency. amend with bone meal of another phosphorus heavy fertilizer. use a balanced liquid fertilizer for a quick fix.
edit: what are you feeding them and how often?
jdelong69
Looks like your greenhouse is getting too hot in the daytime
widespreadhippieguy
They say water the base before sunrise not the leaves especially, it can cause leaf mold especially in mid temp climates, some plants like/ need a misting but not all
widespreadhippieguy
Also over nitrogen n/p/k will cause burn
Flashy-Panda6538
I own a small commercial greenhouse and grew up in that business, so I’ve had a great deal of experience with growing vegetables and ornamental plants. I also have a farm in addition to the greenhouses. What type of soil are they growing in? Potting soil with compost or what? It appears to me that you are severely deficient in a nutrient, likely a micronutrient but it could also be phosphorus or potassium. Does the fertilizer that you are using contain micronutrients as well as NPK? If not there’s your problem, especially if you are using potting soil. You likely have multiple deficiencies going on if your fertilizer doesn’t have micronutrients in the ingredients. Heat stress could also be an issue. Is your greenhouse ventilated by fans? Let me know the answer to those questions and then I should be able to help you fix this issue. Also, how often are you fertilizing them and what form is your fertilizer in? Liquid or granular?
widespreadhippieguy
Actually after thinking about it even green houses use shape awnings, suns good but too much sun burns plants…
Narrow-Word-8945
Shade cloth over the greenhouse allows sun but not as hot or direct ..!! Should help
Dustyolman
Everything that has been said plus add a fan. Moving air can help cool the plant.
Dazzling_River9903
Second pictures shows nitrogen deficiency, look how pale that green is. Also maybe Mg and K. What irrigation water are you using? The wood chips in the pot are immobilizing the nitrogen, I would not recommend to mulch with woody material. Also I read you’re using a 10:30:10 fertilizer…you will want a fertilizer not that high in P since tomatoes don’t use a lot of P but you want high in K and with some Mg. You rather want something like 5:1:10 as a fertilizer.
palpatineforever
They are not sick, they are not missing things in the soil. they are heat stressed.
Temperature is a funny thing with tomatoes.
last month all the outdoor ones in the UK looked exactly like this. It is technically a nutrient deficiency, however the cause is not lack of nutrients rather the low temp prevents the uptake of the nutrients.
The same thing can happen when the plants are too hot, that they do not take up the nutrients which are already available in the soil. resulting in a deficient appearence.
[https://pmc.ncbi.nlm.nih.gov/articles/PMC7938145](https://pmc.ncbi.nlm.nih.gov/articles/PMC7938145)
If you are already fertilizing as recommended you are going to poision them if you just keep adding more.
Focus on cooling the greenhouse, improve the airflow in the greenhouse to cool it, add a shade cloth.
Also remove those insulating reflective silver panels!
Fuzzy_Accident666
Calcium deficiency, nitrogen deficiency. Yes adding lights would help.
16 Comments
What are you feeding them?
My guess is they’re too hot or getting too much sun. Looks like they’re getting slightly roasted
Maybe there’s residual tomato virus of some kind in the greenhouse that reinfects? Are you reusing the soil and/or pots?
I bought bell pepper seedlings from the store and after I transplanted them the leaves looked the same way
My first guess is magnesium deficiency. Easy fix, water in epsom salts at 1 teaspoon per gallon.
Also could be a phosphorous def but that typically manifests as purple veins not purple interveinal coloration. Maybe hit with fert a few more times at normal rate- be careful because too much N will lead to over vegetative growth with less flower and fruit
it looks like a phosphorus deficiency. amend with bone meal of another phosphorus heavy fertilizer. use a balanced liquid fertilizer for a quick fix.
edit: what are you feeding them and how often?
Looks like your greenhouse is getting too hot in the daytime
They say water the base before sunrise not the leaves especially, it can cause leaf mold especially in mid temp climates, some plants like/ need a misting but not all
Also over nitrogen n/p/k will cause burn
I own a small commercial greenhouse and grew up in that business, so I’ve had a great deal of experience with growing vegetables and ornamental plants. I also have a farm in addition to the greenhouses. What type of soil are they growing in? Potting soil with compost or what? It appears to me that you are severely deficient in a nutrient, likely a micronutrient but it could also be phosphorus or potassium. Does the fertilizer that you are using contain micronutrients as well as NPK? If not there’s your problem, especially if you are using potting soil. You likely have multiple deficiencies going on if your fertilizer doesn’t have micronutrients in the ingredients. Heat stress could also be an issue. Is your greenhouse ventilated by fans? Let me know the answer to those questions and then I should be able to help you fix this issue. Also, how often are you fertilizing them and what form is your fertilizer in? Liquid or granular?
Actually after thinking about it even green houses use shape awnings, suns good but too much sun burns plants…
Shade cloth over the greenhouse allows sun but not as hot or direct ..!! Should help
Everything that has been said plus add a fan. Moving air can help cool the plant.
Second pictures shows nitrogen deficiency, look how pale that green is. Also maybe Mg and K. What irrigation water are you using? The wood chips in the pot are immobilizing the nitrogen, I would not recommend to mulch with woody material. Also I read you’re using a 10:30:10 fertilizer…you will want a fertilizer not that high in P since tomatoes don’t use a lot of P but you want high in K and with some Mg. You rather want something like 5:1:10 as a fertilizer.
They are not sick, they are not missing things in the soil. they are heat stressed.
Temperature is a funny thing with tomatoes.
last month all the outdoor ones in the UK looked exactly like this. It is technically a nutrient deficiency, however the cause is not lack of nutrients rather the low temp prevents the uptake of the nutrients.
The same thing can happen when the plants are too hot, that they do not take up the nutrients which are already available in the soil. resulting in a deficient appearence.
[https://pmc.ncbi.nlm.nih.gov/articles/PMC7938145](https://pmc.ncbi.nlm.nih.gov/articles/PMC7938145)
If you are already fertilizing as recommended you are going to poision them if you just keep adding more.
Focus on cooling the greenhouse, improve the airflow in the greenhouse to cool it, add a shade cloth.
Also remove those insulating reflective silver panels!
Calcium deficiency, nitrogen deficiency. Yes adding lights would help.