Day 18 buds looking light/pale

macsnax

macsnax

Well-Known Member
Looks normal, I wouldn't change anything they're coming along nicely. The first couple weeks in flower the plant is changing is hormones to produce flowers. Not a lot of action right off the bat.
 
Randomblame

Randomblame

Well-Known Member
oill said:
Anyone thing these look too pale? Its day 18.
Coco
Led
Ph 6
Ec is 1.7
Temps are 26c but 20c for the 3 hours in the morning to reduce stretch.

Mayne it's just a bit early in flower... but should they be more darker green and should I up the nutes?
Click to expand...
Keep an eye on the VPD. With LEDs air tends to dry out pretty quick and a too low humidity cause a too high VPD. The plants are forced to take up and transpire more water and this can lead to a nutrient imbalance. Plants take up more and more calcium and if you keep the VPD that high it will end up with a magnesium lockout because of calcium toxicity and within the next weeks more and more elements get locked out.
There are lots of VPD tools available and a few vids on youtube which explain in detail what is is and why it is important to keep the vapour pressure deficit in the right area according to the plant stage.
I always try to keep my temps around 28°C and use 65-75% minimum humidity in early veg, 60-70% in the 1st half of the flowering stage and 50-60% in the 2nd half and since I'm doing that I no longer see pale green or damaged leaves with lots of chlorosis in between the veins.
Only keep in mind to download the charts with 1-2°C less leaf temps cause that's what you have when growing with LED's.
 
O

oill

Well-Known Member
Randomblame said:
Keep an eye on the VPD. With LEDs air tends to dry out pretty quick and a too low humidity cause a too high VPD. The plants are forced to take up and transpire more water and this can lead to a nutrient imbalance. Plants take up more and more calcium and if you keep the VPD that high it will end up with a magnesium lockout because of calcium toxicity and within the next weeks more and more elements get locked out.
There are lots of VPD tools available and a few vids on youtube which explain in detail what is is and why it is important to keep the vapour pressure deficit in the right area according to the plant stage.
I always try to keep my temps around 28°C and use 65-75% minimum humidity in early veg, 60-70% in the 1st half of the flowering stage and 50-60% in the 2nd half and since I'm doing that I no longer see pale green or damaged leaves with lots of chlorosis in between the veins.
Only keep in mind to download the charts with 1-2°C less leaf temps cause that's what you have when growing with LED's.
Click to expand...
Thanks for the reply... luckily it's hot here now and I'm cruising at about 70 ish percent rh... so I'm in the right bounds that you are talking about.

I'm gonna have a challenge getting it cooler and lowering rh in the second half if it stays this hot... but even with an ac

Things are looking fine now though
 

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