Deficiencies or heat stress?

[Shleprock]

Growing Acdc strain high CBD indoors with a 900w viparspectra with fabric pots in 420 recipe soil, fox farm nutrients and cal mag ( going easy on the dosage) ph 6-6.5 with RO water. Had a few days of heat increases up 85-90, 4x4 tent in garage. Humidity drop to 40% rh also. I’m having a hard time playing god with a stable temp and humidity lately. Any help would be appreciated, thanks.

 

[Hydroholic]

I fight the same conditions. Tent needs to be either in a room or a a/c unit blowing in it. High temps will Hermi a plant. Also you can hang a wet towel over a 5 gallon bucket with a fan blowing on it to raise humidity. Then just lift the bucket with a little water to rewet the towel. Or a humidifier. Lots of us have to run a humidifier or dehumidifier year round. One of those dreaded buys. I would worry more about getting those temps under control before humidity.

 

[Florushingflowers]

From what I can see on these leaves id personally assume there is a slight magnesium deficiency. Magnesium deficiency is pretty common so not to worry. Try adding 1 tsp of Epsom salts sprinkled onto your medium. also maybe back off the nitrogen slightly. Hope this helps!

 

[Shleprock]

I fight the same conditions. Tent needs to be either in a room or a a/c unit blowing in it. High temps will Hermi a plant. Also you can hang a wet towel over a 5 gallon bucket with a fan blowing on it to raise humidity. Then just lift the bucket with a little water to rewet the towel. Or a humidifier. Lots of us have to run a humidifier or dehumidifier year round. One of those dreaded buys. I would worry more about getting those temps under control before humidity.

Thank you for tips, going to try the towel trick.

From what I can see on these leaves id personally assume there is a slight magnesium deficiency. Magnesium deficiency is pretty common so not to worry. Try adding 1 tsp of Epsom salts sprinkled onto your medium. also maybe back off the nitrogen slightly. Hope this helps!

will try this, thank you!

 

[Kapncannabis]

In the winter I have 4 or 5 buckets of water plus a humidifier to keep humidity up. the space heaters sap all the moisture out of the air. in summer the ac removes the moisture but not as bad. I hardly ever have high humidity problems. Unless rain sets in for a week or two.

 

[Kapncannabis]

From what I can see on these leaves id personally assume there is a slight magnesium deficiency. Magnesium deficiency is pretty common so not to worry. Try adding 1 tsp of Epsom salts sprinkled onto your medium. also maybe back off the nitrogen slightly. Hope this helps!

I agree, it does look like mag. deficiency

 

[Bush Doctor 77]

Welcome. If you have alkali water, like most of the western US, try using 1/2 tap to 1/2 RO water. The hardness in the west is from Ca/Mg in the water. I have very hard water, and never use Ca/Mg additives. I run 1/3 RO and 2/3 tap.

 

[bobrown14]

Could be a Ca deficiency or Mg toxicity. They look similar.

How much Ca is in the soil mix and whats the source?