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Santa Cruz, CA

I was wondering at what temperature or combination of temperature and humidity, do pumpkin leaves break down and start to turn toasty brown?

6/15/2009 12:23:21 AM

Puyallup, WA

It is an unknown. Some plants can take the heat better than others. It also depends on your watering times, shade cloth, direction that the plants are growing, ect.
Sudden changes in temps can burn a plant's new growth in just one day if temps go over 80° on some plants.

6/15/2009 12:51:45 AM

Ohio

I agree with Stan on that, I have some plants that burn easy while others right next to it never get touched. Weird really, wonder if the plants that burn easy could be lacking something else, like as far as nutrients go Stan?
Cause I have had plants with a gazillion roots that still end up burning or drooping real bad in the heat while others haven't. Maybe there could be another reason why they burn so easy?

6/15/2009 4:49:20 AM

Joliet, IL

i have found the most leaf burn to occur on high uv sunny days with a north or east wind with low humidity following cooler cloudy days. temperatures can be as low as the high 70s and this still can occur on some plants. these are days i will now set the misters to pop on earlier like 10am. had this scenario yesterday and by 10:45, i could tell a couple of small newly forming leaves went past the threshhold and leathered out. today the 10 am set time should help those tender new leaves to stay cooler. i imagine the more developed a root system is, the better odds of not burning. the plants grow so much and so fast at this stage of the game that keeping up with growth has to be hard to do for the root system.

6/15/2009 7:06:07 AM

San Jose [email protected]

I dont think you have to worry about that in santa cruz Christine, my leaves turn brown, but I dont think that is from the sun, but disease, or mites.

6/18/2009 9:48:53 PM