Advise on keeping heat at night

I grow in an outdoor shed, weathers getting colder now.

I need to keep the temperature up at night so do I use some kind of heater on controllers?

thanks in advance

A heater is likely the solution.

Using an electric space heater with a thermostat would be ideal. Make sure the thermostat can handle the ampacity of the heater.

Any insulation that you can add will help the heating bill.

Yeah I was thinking this but it’s all tight for space. I think once done I need to clear out and start again! Thanks

Tob522 said:

Yeah I was thinking this but it’s all tight for space. I think once done I need to clear out and start again! Thanks

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What about insulating from the out side?, I don't think a silver shed would look out of place. That's only a joke depending on how radiculess of a suggestion it turns out to be.

Also, insulate the floor, Maybe add more light for heat and longer light cycles if you are growing autos, I plan on growing autos this winter in a cool basement, Then switch to regular plants in the summer when I don't want so much heat.

Gratefultrip said:

Also, insulate the floor, Maybe add more light for heat and longer light cycles if you are growing autos, I plan on growing autos this winter in a cool basement, Then switch to regular plants in the summer when I don't want so much heat.

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If you have space large black barrels filled with water position them so that your exhaust can help heat them in someway. Many greenhouse growers do this as a thermal heat store. Water heats up during day and releases heat at night.

For my loft grow I had to use 120mm kingspan before snow stopped melting on roof. You lose a heck of a lot of heat without insulation.

Good on you for giving this a try! It can be done.

If you can squeeze the space, consider dividing the shed into a flowering area and a veg area. Your veg lights will do double duty and provide heat when the flowering girls are sleeping. Just make sure you aren't inadvertently letting light bleed happen.

If you've got the height, vegging plants below a flowering shelf is a good way to get the most from the heat thrown from your veg light. LST can help control the height. A 24 hour hi/low thermometer or two is a good idea also. Knowing the cold and hot spots and temp differential of inside your shed and the outdoors will help you too. Cardboard or a tarp(s) can be used to create a "micro climate" area inside the shed to hold heat near your plants. Your plants only care what temp they are and could give a fuck if your shed stuff 6 feet away gets cold.

If using veg lights for heat isn't enough, not a bad idea to tape over any lights on an electrical heater that your flowering plants will "see" when they're sleeping, again, you don't want light bleed.

Don't skimp on extension cords, heavy duty is safer. Not a bad idea to get some mouse traps either, the fuckers will chew cords, plants etc.

OP, you mention keeping the temps up at night. Does that mean the lights are on during the day, or the heat from the lights at night isn't enough to warm the room?