Hello,
I have an issue I haven’t been able to master yet. Been growing for a year now, when the plants go in to flower this issue appears.
I have thrown damn near everything the store can sell me at this problem on previous grows.
Outside I’ve had no issues. In fact this past spring I was able to take my plants outside to finish and ALL issues went away.
All auto flower from seed. Issue appears overnight on the upper leaves.
Per the sticky request here is the pertinent information;
1-from seed
2- 31 days from seed
3- plant is 14”
4- 5gal fabric
5- soil mix is
Happy Frog and worm castings 4/1. (however I’ve had the same issue with all different brands of soil mixes) with 3tbls per gal 4-3-4 and 5 tbls total of bone meal 0-10-0
6- water about 2 times a week. Water thoroughly, wait for pot to get light before watering again.
7- softened well water at 6.4-6.6 ph (as stated earlier all problems went away when moved outside. No cal mag, no ph-ing)
8- no top dressing yet. Water only( with cal mag the last 2 waterings before issue appeared)
9- no foliage spraying
10- 2spider farmer 1000s and 1
Mars hydro 1000 over 2 plants (have had as many as 4 at a time)
11- lights are 19” away PPFD is 600+/- DLI is about 40+/- (ppfd meter android app calibrated to manufacturers par map) 18/6 schedule
12- 4x4 closet painted flat white (first grow with flat white. Had reflective film and mirrors before)
13- daytime 75-77deg 62% rh+. dark period 68deg 60%rh
14-no soil ph tester (as stated this same issue starts at preflower no matter the soil I have used. I’ve use quite a few in the last year.) coast of main,
ffof, ffhf, m3, Detroit water only mix, Canaganja…
15- there are a few soil gnats but they are under control via sticky traps and pea gravel.
16- been growing for a year.
Your expertise is greatly appreciated.