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cannabis seed germ stoped growing

Keeping the above in mind, seeds do need moisture to germinate. Keep your soil moist but not damp. The best approach is to use a hand sprayer with a fine mist setting. Use a transparent germination hood or cling film to keep the soil from drying out.

If your substrate drains poorly, excess water in the soil will prevent your seed from accessing oxygen, and it will encourage fungal growth. You can improve the water drainage of your soil by adding some perlite. Also, always make sure your planting containers have holes in the bottom for water to drain out.

While tap water may be okay for more mature cannabis plants, it can be a problem for seeds and seedlings. Tap water contains chlorine, fluoride, and salts that can be detrimental to healthy growth and may even prevent seeds from sprouting altogether.


Solution: Only plant your seeds in a sterilised (i.e. new) potting mix as this won’t contain these harmful organisms. But your substrate isn’t the only thing you need to keep an eye on. You’ll also need to make sure your containers are clean, as these can also carry mould and other harmful pathogens. If you encounter fungus problems when you’re germinating, it is best to get rid of the seed and the contaminated growing medium and start over.

There are a whole lot of things that can prevent cannabis seeds from germinating. Here are some of the most common reasons why your seeds may not “pop”:

Just like food, seeds are living organisms that need to be stored properly, otherwise they’ll degrade, die, or won’t germinate. When storing your seeds, keep them away from light, extreme temperatures, and humidity. A dark cupboard with stable temperatures is fine. For long-term storage, place seeds in a sealed container and store them in the fridge.

Handling your cannabis seeds with bare hands can contaminate them with all kinds of nasties like bacteria and fungus. Unfortunately, seeds and seedlings are especially vulnerable to these types of harmful pathogens.

If you are new to cannabis growing it is not advisable to start with hydroponics. Don't make your first cultivation experience unnecessarily complicated! In hydroponics you have to constantly monitor EC and pH, choose the correct nutrient formulas and feeding schedule, clean and flush your system, invest in expensive equipment, etc. If you are insecure about germinating and growing in rockwool or other hydroponic substrates, switch to soil or start with a small test group to gain experience.

A very small percentage of plants turn out to be triploids (ie. have three sets of leaves) among thousands of specimens. This does not impair plant health and is a feature unique to cannabis as a plant species (ie. not restricted to our genetics). For more info on triploids please see our FAQ. Also very rare, but not a reason for concern, are twins. These appear when there are two embryos in one seed. If both seedlings are the same size you should separate them quickly before roots get entangled and then you have two plants for the price of one! If one seedling appears inferior just remove it. If a seedling has fused cotyledon leaves or a young plant has fused leaf tips on a leaf this is nothing to worry about and it has absolutely no impact on growth or flowering. Nature is always trying out new combinations and that cannot be prevented in selective breeding.


Especially with our genetics you will find growing on soil very easy and rewarding. It is highly probable that any benefits you may be expecting from hydroponics, such as a higher yield, will be much simpler and securer to achieve with a straightforward soil cultivation!

Seeds did not germinate

We work with distributors who enjoy the best reputation in the industry for professional storage and service. Our resellers are supplied by us directly or through our distributors. Although we make an effort to identify any black sheep in the cannabis seeds market it is impossible for us to monitor resellers all the time.

Possible causes for:

Here’s a short message of encouragement from our master gardener, Jaci:

I start all my seeds in pure compost from my piles, screened through 1/4” hardware cloth, with a sprinkle of bone meal mixed in. If snow melt here in Vermont is late and even raised beds are too wet to work, they get weekly fish emulsion to keep them vigorously growing, or even potting up for those that like warm soil. So I take care not to start seed too early since younger vigorous transplants do better than older root-bound ones.

Possible Causes

When gardening, it’s an unavoidable fact that you will have successes as well as failures. Failures can be caused by an outside force you have no control over (cat digging up your seedlings, a tray of tiny green shoots getting knocked off the table by accident, etc.), but it can also be caused by things you do have control over. Overwatering, under watering, not enough light, and more. These mistakes are very common, and not something to feel bad about!

I had those little gnats this year. It’s bad news if you have them! They lay eggs and the larva are in the soil and eat the roots. I had 6 inch plants that should have had a large root system hardly had anything. I tried treating the soil and plants (above the soil) with non toxic dish soap suds, and even watering the plants with the soapy water, then flushing out the soap after 15 minutes or so. It seemed to really take care of the problem.

February 10, 2020