Cannabis Mulch – Proper Ground Cover for Growing in Hot Climates

PatrickCannabis Mulch, Growing Cannabis Outdoors, Heat Stress, Mulch2 Comments

cannabis mulch

Mulch is essential for a number of reasons. First, it cools the soil and cuts down on water loss. It also acts as a proactive cover that reduces erosion and suppresses weed growth. Applying cannabis mulch is easy; and it keeps the surface from drying out. Adding a 3 to 6 inch layer of mulch will also prevent sediment run-off and keep your plants happy.

Choosing the Right Cannabis Mulch

As organic mulches break down, soil fertility improves as it decomposes. The perfect mulch is one that is readily available, cheap and abundant. In other words, don’t go out of your way when selecting ground cover. Mulches do not have to be expensive. In fact, they should be the cheapest amendment in your garden and often times are free! Wood chips, straw, newspaper, cardboard, compost, grass clippings, and leaves all provide suitable options.

Mulch can also make it difficult for water to penetrate soil evenly. In fact, many mulches absorb water that often times prevent water from entering the soil. Make sure water penetrates soil evenly by using a aerated nozzle when applying water. Some mulches like rocks and stones provide great drainage, but are difficult to remove when adding new organic nutrients.

Why is Cannabis Mulch so Important?

Applying mulch is a common practice that most cannabis growers employ. The best time to apply mulch is when temperatures rise and top soil has warmed. To check your soil temperature, inexpensive soil thermometers work great. On hot days, it is easy for top soil to rise above 120°F. Cannabis will not grow under these conditions.  Regardless of how you grow, you should apply mulch in all growing conditions including pots and raised beds. Small pots can be difficult for controlling soil temperatures and heat stress, especially black pots exposed to direct sun light.

Indoor growers should avoid outdoor mulches that might have bugs. For indoor growers, I usually recommend using expanded clay pellets or perlite. Not only will they insulate your soil, but they will also protect your plants from fungus gnats!

2 Comments on “Cannabis Mulch – Proper Ground Cover for Growing in Hot Climates”

  1. How would it be if I used a layer of perlite on top of the soil vs the mulch or straw that you recommend? Wont it keep the soil cool similar to mulch while better allowing for drainage?
    This question is for outdoor growing.

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