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optimal temperature for seed gerimination cannabis

Do not fertilize in the first weeks of growth on soil! This is the #1 cause for sick plants. Transplant into quality horticultural grade potting soil and bigger containers as the plants grow larger. Rootbound and sick plants should be avoided. Mandala plants grow quicker and more vigorously than most other strains. Do not let your good plants vegetate in tiny cups and cramped pots. You can get a high % of males or male flowers on your females if you do not care for your plants properly.

HYDROPONICS

Professional horticulturists rarely use pre-germination methods to actually grow out the seedlings because of the shock suffered from transplanting them. For example, we use the paper tissue method only as a quick test for germination rates of aged seed stock from our genetic repository. This allows us to see beforehand how many seeds we have to put in soil to get the amount of plants we require for breeding projects.

Please use high quality soil that is suitable for seedlings (see our SOIL GUIDE for more info), or use rockwool starter cubes for germinating seeds.

IMPORTANT: Don’t cover pots with plastic wrap, don’t use a humidity dome to seal off the pots, or place pots/rockwool cubes in a propagator that’s completely covered! This prevents fresh air exchange, raises humidity to excess levels, and easily facilitates the spread of fungus. The seeds will rot before they can germinate. Excess humidity combines with lack of oxygen is the #1 cause for poor germination results!

For optimal results we advise against the use of jiffy's, peat pellets, and rooter plugs. If you are absolutely keen on using such products you should at least test the product first with a few expendable cannabis seeds before sowing your valuable seed collection.

Mandala Seeds places great emphasis on the quality of the seed stock. We guarantee that the seeds from all products are fresh and viable when they are dispatched to resellers and customers. Seeds harvested from each mother plant are checked for optimal germination rates before they are approved for sale! In large tests (1000 or more) our seeds achieve a germination rate of 99,6%. Our seed stock is refreshed every 6-12 months! Therefore seed vendors and customers can be certain to purchase and store viable seeds at any time.

Step 2

The kitchen paper may only be damp!

All hemp seeds have different germination times depending on the breeder. The longest take up to 14 days to germinate. Therefore, do not throw the seeds in the garbage after 2 – 3 days just because you don’t see any germs yet. But keep in mind that there are always seeds that just don’t want to germinate. It is a natural product.

We’re talking about media temperature not room temperature!

First variant:
So that the cannabis seed can germinate, you put it in garden soil. As soon as it is frost-free outside at night – this is certainly the case from mid-May – you can also place the pots in the open air. Put the cannabis seeds about one centimeter deep into the fresh seed soil, pour in a little water and close the hole with the seed. Make sure that the soil is moist, but not wet, otherwise the hemp seeds will start to rot. If you pull a thin plastic film over the pot, you create a greenhouse effect in it, in which the plant can really feel good. After about a week, the first shoot spikes out of the ground. Now the plant must always be kept moist. Sometimes, until the cannabis seeds germinate, you need a lot of patience.

Once the seeds germinate, gently plant the germ down. 5 mm deep turned out to be optimal.

• The ideal temperature is between 22° and 25°C (71–77°F)
• Your growing environment should be damp/moist, but never wet
• Relative humidity range should be between 70% and 90%
• Seeds favour fluorescent lighting (Cool White code 33)
• Minimise the amount of seed handling you do
• In hydroponic/rockwool plugs, the ideal PH value is 5.8–6.2

Planting directly into your growing medium prevents having to move seeds when they are at their most fragile. That first root tip is covered with microscopic filaments that are easily damaged. Given that both a cup full of water and moist paper towels are more prone to temperature fluctuations from their environment, planting in soil is a much safer option.

GERMINATION TEMPERATURE PLAYS A CRUCIAL ROLE

Arguably one of the least effective methods, but it is still viable. Incredibly simple to facilitate, beginner growers may opt to germinate their seeds in a glass of water. Half-fill a glass or bowl with water that is approximately 22°C (71°F).

You will need to invest in a few pieces of unique equipment, but by using stone wool blocks, you can create a perfect utopia for germinating cannabis seeds. Soak the stone wool blocks in the same way you would a soil medium. The wool will retain the moisture and prevent the need to water during the early stages of germination. After the wool blocks are soaked, stick them in a plastic tray that also has a lid. Large cake tubs are ideal.

Probably one of the most common methods of germination. The kitchen towel method comes in several iterations. Some growers use cotton wool pads or absorbent pieces of paper. For this guide, we will be using kitchen towel as it is readily available and holds moisture relatively well.