Soil, containers and media

Composted Bark Fines in Cannabis Mixes: Pine Bark for Structure and Air

Pine bark fines add structure and air to cannabis potting mixes. See why composted bark beats fresh bark and what portion of a blend it should fill.

A peat free potting mix swaps peat moss for coir, compost, bark or wood fiber. See why growers switch and a simple blend for cannabis pots.

A soil amendment improves structure while a fertilizer adds nutrients. See how they differ, where they overlap and how cannabis growers use both.

Top dressing cannabis means spreading dry amendments on the soil around a growing plant. See what to use, where it goes and when to repeat it.

Cottonseed meal is a slow organic nitrogen feed that tends to lower soil pH. See its analysis, how long it lasts and when it suits cannabis beds.

Soybean meal is a plant based fertilizer with about 7 percent nitrogen. Learn how fast it feeds cannabis and why it should go in before planting.

Clay pebbles are fired clay balls for hydroponic cannabis grows. Learn how they handle water and air, how to rinse them and when they fit best.

Lava rock adds weight, air and drainage to cannabis containers. See how to screen, rinse and blend it into a mix and why a bottom layer fails.

Parboiled rice hulls add drainage and air space to cannabis potting mixes. Learn how they compare with perlite and what share of the mix to use.