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ShaggyGrower started grow question 4 years ago
What effect does heat/cold have on roots & above ground? So, what effect should I see in the roots and above ground growth with substrate temps at 90f, 85f, 80f, 75f, 70f, 65f, 60f, 55f, 50f, 45f, 40f?
Shaggy's 5 Space Cookies Grow
19 weeks
Shaggy's 5 Space Cookies Grow ShaggyGrower
Space Cookies
15 comments · 3 years ago
Week 3
Techniques. Defoliation
Experimentgreen answered grow question 4 years ago
Hey there so extreme cold will slow your plant growth ans can eventually kill the plant especially at freezing temps. I see the plants are partly outdoors partying with the tomatoes which lucky are much like cannabis, at this stage if you can keep temps between 70-85 with good humidity thats best, but even if you went down into the higher 60s that's ok too, with slightly cooler night temps. If your substrate can stay above 60 it'll discourage mold and other things. The plants and tomatoes are looking good. :) oh also a lot of your plants leaves look like they're "praying" which is a good thing. I think things are coming along great.
biggreens420 answered grow question 4 years ago
At 90 u would see effect on the plant e.g. wilting Browning drying edges at 70 is around perfect in my opinion and the lower you go your plant will slow down as the roots won't dry when colder and potentially causing root rot stunting the plant keeping it at a certain stage in till it either dies or temps pick up and struggle to start growing hope this helps tried to explain what would happen at different temps
FlavoursUk answered grow question 4 years ago

Temperatures below 18 Degrees can stunt plant growth drastically, been there and done it.
Ideally what you are looking for is for your plants medium to be around 5-10 Degrees cooler than your grow room, assuming your grow room isn't too hot.. So don't exceed 28-30 Degrees and you will be fine. But also don't go below 18 Degrees or your plants growth will be stunted. Easiest way to put it.
Stick answered grow question 4 years ago
Hi there! The perfect temperature for roots is around 75°F / 24°C and should always be a few degrees cooler than the grow room air temperature. Soil temperatures have a major impact on growth. Remember those plants are warm season annual with tropical origins. Having a too-cold soil will stress the plant and delay growth. I'll be around, good luck with these babies!