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what soil to use for growing weed indoors

As your indoor weed plants grow, they’ll need less attention, but you’ll still need to check up on them every 2-3 days.

This is easily achieved by placing an exhaust fan near the top of the space to suck out warm air—warm air rises—and adding a port or passive fan on the opposite side of the space near the floor to bring in cool air. A complete air exchange throughout the entire grow space should occur once every minute or so.

In addition to bulbs, HID lighting setups require a ballast and hood/reflector for each light. Some ballasts are designed for use with either MH or HPS lamps, while many newer designs will run both.

Ceramic pots

Carbon filters usually work best when positioned at the highest point in your grow space, where the most heat accumulates.

It’s a good idea to start small—the smaller the grow, the less expensive it is to set up. Newbie mistakes will be less costly if you only have a handful of plants. Additionally, most state laws only allow for growing six plants, but some allow up to 12.

There are many different media to choose from, including good ol’ fashioned pots full of soil, rockwool cubes, a hydroponic tray, and more.

Air circulation

It can be tricky getting the right balance of temperature and humidity because they affect each other—turning up your dehumidifier will lower the humidity of your grow space, but it will also increase the temperature of the area. This in turn may require you to turn on an AC unit—everything’s connected!

You’ll also want to take this time to check over your weed plants for pests, mold, or nutrient deficiencies.

What soil to use for growing weed indoors

Generally, anything labeled as an “organic potting mix” will work. This type of mix hasn’t been amended with chemical slow-release nutrients, which is one of the main things you want to avoid with soil for cannabis. I know it sounds like heresy, but even the Miracle-Gro version of “organic potting mix” will work okay, because unlike their original potting mix it doesn’t contain chemical nutrients (though it still has poor drainage and moisture retention – almost any other type of organic potting mix is better!).

Worm Castings

Nugbuckets is a famous organic soil grower! Check out his plants!

Bad Cannabis Soil
Cannabis soil should not have a whole lot of big visible wood chips in it. That means the soil hasn’t been fully composted, and all the nutrients and goodness in that wood is mostly unavailable to your plants.

Organic Potting Mix

The following video shows the soil texture you want (this is Coco Loco, an excellent soil for growing cannabis)

Bad Cannabis Soil
Don’t use dirt from outside! It almost never works, especially if it looks like this!

Vermiculite

Signs of Good Cannabis Soil

If you get the soil part right, you have almost everything you need to get to harvest! With the correct texture, drainage and water retention, you’ve got a perfect base. Add good soil cannabis nutrients, especially in the budding phase, and you should get to harvest with great results!

This plant is growing in Fox Farm Ocean Forest Soil

What soil to use for growing weed indoors

Of course, ample water and oxygen in the soil is a must.

Watering Your Soil

The trouble with organic matter is that it gets depleted rapidly. This means you have to amend it on a season by season basis.

Coco Coir

When buying soil for weed, make sure you understand the basics of good cannabis soil. If you want your plants to offer lots of cannabinoids and trichomes, you have to pay attention to several variables. including: