Thank you for this thread. You've answered a question I've had on my mind. All the plants are growing well in vegetation (18/6), with some N fertilizer added to the water. I switch to feeding them P and K when I move them into the flower room. I think,"Too early?" Maybe I should continue to feed with nitrogen that first week or two in the flower room. The fan leaves (water leaves?) are yellow and lots have fallen off. The buds still have clear drops of resin on them. I don't think adding nitogen would help anything and might make it worst. I water every third day. The plants are solid with two inch or three inch buds on top plus the little popcorn ones on the lower nodes.
Yup, you don't need P to flower. You don't make things worse by giving your plant nitrogen, especially during the stretch. I still feed my OG Kush and Northern Lights plants veg. nutrients (Foliage Pro 9-3-6) and I only fed them bloom formula
one watering....and they are in week 3 of flowering!! If you check out my pics you'll see that they aren't hindered in any way by being fed "veg nutes" in flowering! Light schedule tells a plant to bloom and nothing else!
Your leaves need to stay green up until you are close to harvest if you want max yield. Otherwise, you risk killing your plant before you can harvest at worst, and at best you risk losing out on lots more bud since your plant doesn't have enough energy (leaves) to make lots of flowers or put on the weight that you'd like.
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I switched my plants to 12/12 on 11/13, and I counted flowering day one a week later; I had already started seeing flowers on the top of the plants by that time. BUT, I just put my LSD into flower on the 4th, and still no signs of sex; I put it into flowering at 5 weeks from seed. So since it hadn't shown sex I figure it will be two weeks from the time I put it into flower before I see sex. I was expecting to let it go 70 days, but it sucks that another two weeks will be added to the possible harvest date. Then again, when I did the research online from people who grew the strain, some noted an 80-90 day total flowering time. So that would make perfect sense since it will probably take mine that long or close.
So now I just know to expect a later harvest time--two weeks from the breeder's suggested finish date, to account for late bloomers and to compensate for variables such as the day the plant actually "knows" it's flowering, light intensity, wattage, genetics, etc, etc. If the plant is ready before then, then that's all the better!