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is topsoil good for growing weed

Is topsoil good for growing weed

This is probably the most commonly purchased amendment and is ideal for practically any soil mix. It consists of airy ‘rocks’ known for their white hue. Perlite looks a bit like popcorn and improves drainage while adding oxygen. Use 10-20% to improve water retention. You can go as high as 40%, but you risk leaching nutrients faster. If you use Perlite and Vermiculite, don’t go above 50% for the two combined.

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:

When you water the plant, it moves essential nutrients and minerals to the roots. Then, they travel to the rest of the plant. Water cools overheated plants down and is a critical ingredient for photosynthesis. The best advice we can give is to water the soil until it is moist, but not wet to the touch. Overwatering aids the growth of harmful fungi, which can result in root disease, so exercise caution!


On the downside, soil requires a ton of space, and it is cumbersome. You’re also more likely to have issues with pests than with a hydroponic system.

On the plus side, sandy soil is easy to prepare for cultivation, offers good drainage, and contains high oxygen levels. It is one of the best options for growing weed indoors.

Battery acid and hydrochloric acid have a pH of 0, while liquid drain clearing fluid has a pH of 14. Ideally, your cannabis soil is slightly acidic. Most experts believe that the ideal pH is 6.0. However, you are on solid ground if your soil’s pH is between 5.8 and 6.3. Your crop will survive outside of this range, but the yields are likely much smaller. If you stray too far from the 5.8-6.3 range, the plants will die.

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Irrigation in soil is easier than with hydroponic systems, as is fertilization. With so much information gathered from thousands of years of growing, you can quickly become a soil expert as long as you read the right articles!

This type of soil is among the best organic options for cannabis. Clays consist of fine crystalline particles created via chemical reactions amongst minerals or other natural resources. You can mold or shape clay soil, but it is hard to work with and drains poorly.

Is topsoil good for growing weed

Worm Castings

Try to get soil that looks like this!

Example of “Good” Cannabis Soil Ingredients

Bad Cannabis Soil
Although this seedling is over a month old, it has stayed tiny. Its growth is stunted by the thick heavy soil that holds way too much water and not enough air. Note how some of the soil looks like one solid object.

When it comes to growing cannabis in soil, unless you’re using a brand that is known for making soil that is specifically cannabis-friendly, there are a few things that you need to consider before starting a grow.

Organic Potting Mix

(picture by Wattze)

Is topsoil good for growing weed

edit added: I am pretty much with 4U on pH’ing outdoors, but I grow organic and do not bother.

my main concerns with starting them outside is that the local deer will make a tasty snack of my crop, which is why i am contemplating making a small cage to start em in.


why topsoil and not bag mix. if ya went with top soil be sure get a good 5-way..I like to fill my holes with the same soil they in as to help the transfer. and heres a funny. and may get some heat from. I dont PH outdoor. I use the garden hose. as for nutes. get ya some lilly miller organics and make teas. and whats with the 2 diffrent mediums. you plan a side by side grow to see the diffrance?

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novice ethnobotanist

The amendments needed depends if one is growing organic or chemical plants.