Outdoor Cannabis Yellowing
Some quick background: I'm a first time grower and I have 2 females outdoors planted in the ground in Toronto Canada. This week temps are at 30 degrees celsius during the day and 20 at night on average, with no rain expected for the next 7 days.
My plants are planted with promix and perlite mix. A week ago we had a heavy rainstorm for 3 consecutive days and lead to root root of one of my 3 plants, leaving me with only these 2 now. I should have kept the plants/soil covered for next time.
My initial thoughts are Nitrogen deficiency or the dreaded root rot
Over the past week I noticed Yellowing of primarily bottom leaves of both plants. I'm hoping this isn't root rot, I haven't watered in quite a while except for one light feeding of the top layer of soil with 800ppm 6.0pH'd water yesterday.
Today the yellow seems to have stayed the same/gotten a bit worse. Also, one of my plants have leaves that seems to be damaged by pests or disease? - I'm referring to the white/brown small spots.
What are my next steps?
https://imgur.com/a/DQ11c8M Photos of both plants #1 and #2
Posted Aug 11, 2020, 6:56 PM UTC · edited
Check rainwater pH. If its low, you want your water higher pH.
Its not too bad.
Ill make sure to do that for the next time it rains. Do you think I should try another light feeding once it dries out?
Nitrogen has a huge ph range for utilization. Ph is rarely a problem with nitrogen deficiency. The yellow leaves may not go green again or if they do it will take a while. Whatever nitrogen you give it will be used by newer growth until its saturated. Don't worry about the old leaves. If the yellowing isn't spreading its fine. Also be careful not to overdo the feedings.
Thank you will try another light feeding. I heard feeding nutrients don't need to go deep into the soil and to the deep roots, will just feeding the top portion of roots be sufficient? I'm trying to minimize root rot as much as possible this late in veg.
Much appreciated
If it's not over watered, it won't get root rot.