I harvested this yesterday:
This was an autoflower in a 3gal container. It grew 11 weeks + 4 days. That bud is about 2" diameter. I had a little calcium def earlier in the grow. I think it was self-inflicted: Someone mentioned gypsum for ca def. Just to see how it dissolves in water I mixed a little to measure its ppm. Instead of wasting it, I poured it into the soil. I might have caused a brief lockout. (The seedling also had physical/genetic problems sprouting. Because it's an autoflower, I started it in a 3gal container. But, because of the stress it was stunted. Because it's an autoflower, I couldn't let it veg longer to fill the container. So, it was a little hard in mid veg to get new nutrients to it without also overwatering. I felt like this was the problem when it occurred. But, it could have been the thoughtless gypsum.).
This was grown under a 135w Blackstar UFO (85w actual) and three Cree 9.5w LED "lightbulbs" as sidelight.
I was doing about NPK 1-2.1-2.2 (522ppm) in late flower (up to the day before chop). I "bloom boosted" 2-3 feedings before the last one. This was 1-2.6-1.9 (529ppm). I don't know if it helped. Seemed to ripen faster, swelled. I'm still playing with "boosting" and not. Still trying to see if it's beneficial.
I fed (per gallon):
Veg: 1-1-1.7 (517ppm)
1.8g Sea Grow All Purpose
0.9g Down-to-Earth Langeinite
5ml Botanicare Liquid Karma
Late Flower: 1-2.1-2.2 (522ppm)
1.1g Sea Grow All Purpose
1.1g Sea Grow Flower & Bloom
5.1ml LK
"Bloom Booster": 1-2.6-1.9 (529ppm)
1.0g Sea Grow All Purpose
0.5g Sea Grow Flower & Bloom
0.5g Hawaiian Bud & Bloom
5ml LK
I scaled up to
Late Flower in 2-3 steps, for example:
Transition: 1-1.3-1.8 (518ppm)
1.6g Sea Grow All Purpose
0.4g Sea Grow Flower & Bloom
0.5g Down-to-Earth Langeinite
5ml Botanicare Liquid Karma
Early Flower: 1-1.4-1.8 (508ppm)
1.5g Sea Grow All Purpose
0.5g Sea Grow Flower & Bloom
0.4g Down-to-Earth Langeinite
5ml Botanicare Liquid Karma
Mid Flower: 1-1.6-1.7 (523ppm)
1.5g Sea Grow All Purpose
0.8g Sea Grow Flower & Bloom
5ml Botanicare Liquid Karma
I played around in those ranges. I used
the spreadsheet to play around with increasing one component, reducing another to see which way the NPK ratio moved, just finding something made sense getting from
Veg to
Late Flower. Sometimes I go too far too soon and notice N def.
Also, this is using tap water with 120-180ppm, and soil amended with dolomite. (I have to mix my tap with ro water to get that starting ppm because my tap is much higher.). If you use RO water you'll need to use a calmag product and account for the N that calmag products usually include. The spread sheet makes it easy. (Or, you might benefit from the added N. Especially in veg. In flower you might need to rework the mixes above to try higher P ratios.).