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HYDRO How to finish strong in flowering
- Thread starter MeowMeow
- Start date
Bluey
Well-known member
I tend to go a little conservative in veg but once I go to flower I tend to ramp things up a bit.
You want low RH and low temps so at that stage Id be at about 45%RH and 23 to 24â°C
Hold these temps if you can and lower RH to 40% 2 weeks out from harvest then drop RH as low as you can go last two weeks without rising temps. Low RH will give you the frostiest and highest THC that strain can make. Low temps will keep your buds tight and dense. The highest possible quality.
you will need to give those a trim, remove all the leaves not in the light and make sure all your buds are getting full light.
Heaps of airflow. Measure air temps in the room but not under the lights
Suppliment your flower nutes with a PK suppliment. They do love kelp/seaweed extract in flower but not one with high N. I don't use kelp any more. It will give huge buds but the quality drops off re high THC and less frosty too.
You want low RH and low temps so at that stage Id be at about 45%RH and 23 to 24â°C
Hold these temps if you can and lower RH to 40% 2 weeks out from harvest then drop RH as low as you can go last two weeks without rising temps. Low RH will give you the frostiest and highest THC that strain can make. Low temps will keep your buds tight and dense. The highest possible quality.
you will need to give those a trim, remove all the leaves not in the light and make sure all your buds are getting full light.
Heaps of airflow. Measure air temps in the room but not under the lights
Suppliment your flower nutes with a PK suppliment. They do love kelp/seaweed extract in flower but not one with high N. I don't use kelp any more. It will give huge buds but the quality drops off re high THC and less frosty too.
MeowMeow
Member
Bluey Thanks for the tips. Just curious, how do you keep the RH that low? I have a dehumidifier in the room but it needs to be emptied constantly, and still gets up to 65% in the tent at night. I think I need to add extra clip-fans, too.
For defoliation, how much should I defoliate at 6 weeks in flowering? Should I defoliate a lot, or just the biggest leaves? I realize now I should have defoliated earlier in flowering, but I can see the bottom of the tent isn't getting any light so I know air/light isn't getting through the plants.
For a PK supplement, I'm using General Hydro Flora nutrients, so I was looking at their "Liquid Koolbloom" 0-10-10 "bulking formula" (KoolBloom listing: https://www.amazon.com/General-Hydroponics-Liquid-Fertilizers-1-Quart/dp/B002DV8TBQ/)
I was also looking at their "Ripen" 0.5-7-6 formula since the strains are supported to be 8 weeks and are currently 6 weeks from 12/12. (GH Ripen: https://www.amazon.com/General-Hydroponics-Nutrient-Fruiting-Flowering/dp/B07JMHZTLD) Then again, I feel like it's going to need longer because the buds are still mostly white pistils.
Sorry to go so long! No need to answer or anything. Just putting all my thoughts out there.
​
ductwizard
New member
hey meow here's a thought, can you hook your dehumdifier to a condensate pump? they are mostly used for a/c work but have a float switch and pump out using a 3/8 plastic tube. they are cheap and h.d. or lowes carry them
MeowMeow
Member
ductwizard I will look into that!
MeowMeow
Member
I have a big CanMax exhaust fan, and then the intake holes at the bottom of the fan are propped open to let fresh air in. It makes it pretty breezy in the tent (I can see the leaves moving) but I thought it might help to add a little extra airflow above the buds with clip fans? I think my biggest problem with humidity is I live in a humid part of the country, and the humidity outside and in the rest of the house is often 60% or higher.
Bluey
Well-known member
I run a 50ltr/day dehumidifier. On my last grow I had a jungle in my flower room and I couldn't get it any lower than 40% with 5 plants, large too, more than a pound of bud each. I supplemented that with two air conditioners and one of those is quite good at removing moisture also. So full climate control in the room. I cannot get temps below 22â°C and dehumidify effectively as that is too low a temp for the dehumidifiers to work well so RH starts to rise at that point. I drain to waste, the dehumidifier has a drain. I can automate the dehumidifier using its own built in hygrometer, not very accurate, or the power point controlled by two other hygrometers I have in the room wifi connected and it's all automated.
I use an industrial wall fan and a floor fan for full room air movement both are like 18" and both oscillate.
At this stage I'd only remove the leaves not getting direct light. It will help with lowering humidity and if they are not getting full light they are not doing much. Trim them over 4 or 5 days to reduce stress. Leave everything on getting good light.
I don't use anything but base bloom nutes and PK so can't comment on those other things, but stay away from plant growth regulators (PGR). Google it.
Bluey
Well-known member
Here's one of my grows with a link in the first post to a previous grow. 100s of pics
https://forum.growweedeasy.com/foru...e-zkittles-x-sour-diesel-sativa-x-photoperiod
https://forum.growweedeasy.com/foru...e-zkittles-x-sour-diesel-sativa-x-photoperiod
MeowMeow
Member
Thanks for the excellent advice Bluey . I did what you said about the leaves and the buds seem to be fattening up magnificently. I think they're about 7 or 8 weeks from 12/12 now. Not sure how long is left.
I do think I could have taken more leaves but I noticed some of the top leaves are starting to turn yellow, so I figured better to leave extras in case they die. I'm certain I need to move the grow light higher but that's not an option so I'm just trying to ride it out to the end.
I decided to stick to the GH Flora trio by itself since it seems to be doing okay. I think I want to fully research the different General Hydroponics Bloom/PK supplement options before I choose one to give to my plants, and I haven't had time to do that yet. Life gets in the way!
Hopefully I'm at the home stretch, but the buds still look almost totally white, so I'm worried they're going to go a lot longer than I initially expected.
A guy at the hydro store convinced me to give a 600W HPS a try to try to achieve closer to 2 pounds in a 4x4 space. After growing with LEDs for a while, the buds definitely seem bigger/longer compared to under 600W of LEDs, but I also think the HPS may be making buds take longer to mature in the flowering stage. Or maybe it's just the particular strains. It makes me wonder if the "bigger yields" from HPS is actually coming from the plants just straight up taking longer to finish maturing, so buds have more time to get bigger. Regardless, I'm feeling pretty hopeful about yields here!
I do think I could have taken more leaves but I noticed some of the top leaves are starting to turn yellow, so I figured better to leave extras in case they die. I'm certain I need to move the grow light higher but that's not an option so I'm just trying to ride it out to the end.
I decided to stick to the GH Flora trio by itself since it seems to be doing okay. I think I want to fully research the different General Hydroponics Bloom/PK supplement options before I choose one to give to my plants, and I haven't had time to do that yet. Life gets in the way!
Hopefully I'm at the home stretch, but the buds still look almost totally white, so I'm worried they're going to go a lot longer than I initially expected.
A guy at the hydro store convinced me to give a 600W HPS a try to try to achieve closer to 2 pounds in a 4x4 space. After growing with LEDs for a while, the buds definitely seem bigger/longer compared to under 600W of LEDs, but I also think the HPS may be making buds take longer to mature in the flowering stage. Or maybe it's just the particular strains. It makes me wonder if the "bigger yields" from HPS is actually coming from the plants just straight up taking longer to finish maturing, so buds have more time to get bigger. Regardless, I'm feeling pretty hopeful about yields here!