RH 55-80 during flowering and nute advice

[lockdowngrower]

Are you growing autos or photos? If photos, you should be running 12/12 or some variant in flower. If you ran your light at night(cooler temps= more humidity), this may help regulate the humidity. If you are running autos, you could try the 24/0 light schedule. Over all no matter what you are growing, spread each plant as wide open as you can to allow circulation(providing you have a fan or two in your tent). Either way, the more circulation/ breeze you have in there without going overboard, the less likely humidity will be catastrophic.
If you can manage to stay closer to the 55% and circulate well, you should have no issues.

they're autos and on a 20/4 schedule, u reckon go 24?

 

[lockdowngrower]

Hi @lockdowngrower, nice looking plant. You definitely want to get humidity down to the ~50% range or a bit lower for flowering. If extracting from your tent will not do the job, you could try a dehumidifier outside the tent in the same room. This should allow you to get the RH in the tent down without using space you don't have. As your buds plump up, RH in the 70's and 80's could mean mould and lots of it.

Another option to help with the mould issue is a product called RotBlock. Not sure whether you can get your mitts on it in Scotland, but it seems effective, and could save your bud from mould if you can't control the RH.

Good luck with the grow.

I only have a 4 inch exhaust system, I thought for the size of tent it would of done the job. Looks like my best bet is to make space for a humidifier outside tent, I'd much rather try and prevent it than have to fix it thanks for your advice

 

[Mustang92]

a small a/c unit will remove humidity , any shite window unit will due.

 

[Olderfart]

I only have a 4 inch exhaust system, I thought for the size of tent it would of done the job. Looks like my best bet is to make space for a humidifier outside tent, I'd much rather try and prevent it than have to fix it thanks for your advice

A 4" system should be just fine. Unless your filter is plugged, there should be no problem moving enough air. A speed controller on the fan can be handy sometimes, but if you are not getting RH down far enough, you probably want to be on full speed anyway.

A dehumidifier in your room should sort things, just make sure that air can move easily into the tent to replace what the fan removes, and keep the room isolated so the dehumdifier is only working on the room not the rest of the house. If you exhaust the tent air to outside the house, that will prevent recycling the moisture from in the tent, but it will also be sucking air from the rest of the house. I suspect your best bet is to exhaust outdoors because given the size of your plant, your tent exhaust is likely to be more humid than the air in the rest of the house, so sucking from the house would likely be less work for the dehumidifier than recycling exhaust air.

Good luck with the grow.