Hello everyone, and thank you in advance for any comments or assisatance.
This is my first ever grow for cannabis. I have grown hot pepper plants in the past with decent success, so I had thought that some experience with plants would help me here. Unfortunately, I’m running into an alarming problem in this second week of flower. The lower leaves of all of my plants are turning yellow with brown spots and are drying up and dying at an alarming rate.
Here’s a quick rundown of my setup:
Strain: White Widow Autoflower
Soil: Fox farm ocean forest
Pots: 5 gallon fabric
Lights: Vivosun VS4000 (400 Watts)
Temps: Night: 78F Day: 85F (Peaked at 92)
First off, I know the temperature is high. Unfortunately there’s not much that I can do. This summer has been hot. My A/C can only do so much. I’ve done everything I can but this is as low as I can get the temperature to go.
The plants had been growing perfectly fine up until the first flowers started showing.
I am currently entering week 6 of the grow [week 2 of flowering] and I have noticed the lower fan leaves of all 4 of my plants begin to develop brown spots and wither away. The lowest set of 3-fingered leaves on the plant in the supplied pictures went from perfectly healthy to dead in 3 days. I had pinched and bent the large fan leaves down so that they would not shade the branches as they were first forming, a few weeks ago.
The soil I have been using is Ocean forest from Fox farm. Up until I began seeing preflowers, I had not used any nutrients as the soil had been advertised as feeding plants for that amount of time.
Upon seeing preflowers about a week and a half ago, I started using Fox farm Tiger Bloom nutrients in accordance with the bottle directions.
I also am battling with fungus gnats. For about a week I have been spraying neem oil on the lower soil. I have also been using mosquito bits in my water, both with and without the tiger bloom nutrients. The gnats seem to be dying off.
I am having trouble identifying what the problem could be, since there has been hardly any time between this problem starting and the leaves dying off. I’m beginning to panic that something has gone horribly wrong.
It seems like this grow has been going perfectly until suddenly falling off a cliff.
Can anyone shed some light on the situation?
Here are my photos: