Tomato leaves curling

[monkeyboy]

The bush toms in the SFG are fine. The GD and MM tom plants in blowhouses are struggling. I think it's due to the heat but not sure if I'm over or underwatering:







Tomorrow, I plan to leave the front flaps open and see if that helps. I've been watering every evening. I can't do anything to provide shade for part of the day (I'm at work essentially from 7am to 7pm).

I feed twice weekly now at half the strength instead of once weekly at full strength. When I water, I normally run the hose until there's water seeping out of the bottom of the pots into the growbag.

[mothhawk]

Too big a temperature difference between daytime and nighttime.

[burnie]

Mine have a bit of it, 10 degrees at night and nearly 30 in the day, been a bit cooler today so hope they'll pick up a bit.

[geepee]

The bush toms in the SFG are fine. The GD and MM tom plants in blowhouses are struggling. I think it's due to the heat but not sure if I'm over or underwatering:







Tomorrow, I plan to leave the front flaps open and see if that helps. I've been watering every evening. I can't do anything to provide shade for part of the day (I'm at work essentially from 7am to 7pm).

I feed twice weekly now at half the strength instead of once weekly at full strength. When I water, I normally run the hose until there's water seeping out of the bottom of the pots into the growbag.

I 'm having simialar problems....... honestly dont think the difference betweennight and day temps is an issue.....yes it cools at night but daytime residual temps take a while to cool and we are only seeing temps drop fer a few hours before climing again.!
I think the main cause of your (and my) leaf curl is due to too higher day temps, I am now starting to leave my 'Flap'/zip up doorway at least half open during night and fully open daytime.
Today I had plants that were pretty sorry looking on the top shelf, the top leaves/trussed are almost to roof level, I gave them a good drink at teatime and by bedtime they are looking much improved.
Tomorrow I will move them to floor level and keep the door open during the day and at least half open/closed at night.
I'm farly confident they will survve.
Hope this helps.
Gp

[Penellype]

Mine at the allotment and in my friend's greenhouse are also looking very curly, but the ones at home much less so, probably because they get less direct sun. I've taken all of the covers off the outside plants except for the Sungold which are planted in the soil in a bit more shade than the others and have the tall blowaway type covers which have the doors fully open. I'm sure the heat is the cause.

[Small pumpkin]

Some of Mine do the curly leaf thing as well.
I've stopped worrying about it. They still grow, they still produce fruit, they're not covered in harmful bugs and they're not diseased. I just let them get on with.

[Jonnyt]

During excessively cool, moist conditions, leaves may roll upward and become leathery in an effort to repel this excessive moisture. This specific condition occurs around fruit setting time and is most commonly seen on staked and pruned plants. Curling tomato leaves may also be triggered by just the opposite—uneven watering, high temperatures, and dry spells. Leaves will curl upward to conserve water but they do not take on the leathery-like appearance. Plum and paste varieties are most commonly affected.

[idiotwind]

Mine also

Was about to start a similar thread. Noticed on one plant a week or two ago, noticeable on most now. Only the lower few branches are affected so far. Otherwise looking good and starting to set fruit. Indeterminate vines, growing in standard compost in large buckets. Have been fully hardened off and outside for last weeks.
Am a bit worried I’m overdoing the watering now in this heat (29 max but down to 10-12 at night) using a staked 2l water bottle with the end cut off and a hole in the cap. Each plant is being watered daily at the moment so gets about 1.5l-2l a day. Buckets are about 20l.