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tin foil for growing weed

Tin foil for growing weed

The Science: Often you’ll see light bulbs measured in how many “lumens” are given off. For example, let’s say a bulb produces 20,000 lumens – how do you determine how much of that light is actually being received by your plants? A light meter measures “lux,” which is different from lumens, and lux is a better indicator of the amount of light received by your plants. Lux measures how many lumens are received in a specified amount of area (a lux is equal to one lumen per square meter).

Grow tent walls (best reflectivity)

Aluminum foil (also known as tin foil) is often used in the kitchen, and many growers will see that it’s shiny and deduce that it may be a good option to reflect light back at your cannabis plants. Despite what seems intuitive, the dull side of aluminum foil actually reflects light better than the shiny side. Unfortunately, one of the problems with aluminum foil is that it’s extremely easy to crease, and any uneven creasing can dramatically reduce the reflectivity. In fact, anyone who has used aluminum foil knows that it’s a challenge to not crease it! Some growers will crinkle all the aluminum foil, which can help diffuse the light more evenly. Having everything creased all over actually works better than laying it flat with just a few creases. Aluminum foil will not burn your plants like some growers claim, but there are much better reflective options out there and foil should only be used as a last resort before replacing it with something else.

This is a highly recommended option for those who can’t invest in a grow tent or for the crafty DIY grower who opts to build a grow cabinet (or a whole room). Excluding the hammered style texture you see in grow tents, this paint will give you some of the best “bang for your buck” of any reflection option. Flat white paint is inexpensive, effective, and there’s no way to create air pockets or hot spots behind the reflective material. Just paint the walls, let them dry, and you’re done!

Mirrors (good reflectivity for images but not for light…)

It’s important to understand that a light meter measures the total amount of viewable light, and doesn’t measure the “spectrum” of light. A light meter can’t tell whether the light is in the spectrum that your plants prefer or can use. This is why it’s important to get grow lights made for plants like cannabis, so you don’t have to worry about spectrum.

Note: The only way to increase the plant’s saturation point is to supplement with CO2.

Light meters are also useful for testing new or old grow lights to make sure the bulbs are as bright as they should be. As grow lights get older, they tend to produce less light over time, and a light meter can help you decide when it’s time to change your bulbs or upgrade your grow lights.

White Poster Board (up to 60% light reflectivity)

Tin foil for growing weed

Stick to white paint, white plastic, mylar, or something similar. foil is hard to work with, not very reflective, and just creates more heat in the room as when the tin foil is struck by light it heats up.. creating higher temps in the room .


Contributed by: DaChronicKing

Nelson Mutz

^^^kade unless u get a hella good deal on it, that EDIT FOR LANGUAGE expensive, i think the last time i looked it was like 50-100 bucks a roll. i think, iam not certain, i was pretty toasted when i walked in there. i might be adding a zero lol.

Tin foil for growing weed

My plants are almost 3 weeks old and I'm thinking that if i put foil around the bottom it would help reflect light back up under the plant and overall improve lighting. Any drawbacks this could cause?

Foil is a pain, and flat white is around 95% as good as something shiny, so a piece of foam-core cut to fit snugly in the pot will both reflect a lot of light back up and keep the soil moist.

The chloroplasts on the bottom of leaves work exactly as well as the ones on the top of the leaves, there are just not as many of them. So it would have a positive effect.