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germinating cannabis seeds light or dark

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• 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

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.

GERMINATION TEMPERATURE PLAYS A CRUCIAL ROLE

The dome of the plastic container will create your seeds’ own mini tropical climate. If you then place all the components in a temperature-controlled cupboard, you will have created a self-perpetuating supply of moisture—no need to touch the seeds again until they are ready to be transferred to your final growing medium as a young seedling. Using the stone wool block method, your seeds should germinate in one to two days.

Maintaining the ideal temperature (between 22–25°C/71–77°F) and moisture for germination is tricky. Leaving seeds out in the open environment or on a windowsill is far from ideal; a DIY climate-controlled cupboard would do a much better service. A warming mat is perfect for maintaining a constant temperature, but it doesn’t tackle the issue of moisture.

There is, of course, a far simpler way to germinate seeds. Ideal for beginners, the feminized starter kit by Royal Queen Seeds has everything you need to kick-start your next cannabis project.

Once they have sprouted, you’ll want to transfer them to soil or a growing medium. See below for instructions on how to do this.

Once the cotyledon (first round leaves) emerge they occasionally have the seed casing attached make sure you allow it to fall of naturally don’t pull it off.
At this stage you can drop your blue light down to 46 – 60 cm from the cotyledon depending on the light you are using. Maintain this and only water to retain moisture allowing top inch of substrate to dry before watering again until you have a couple of sets of true leaves.
At this stage you plant will be strong enough to survive transplant into larger pots.
If you are using Autoflowers plant the propagation plug in their final pot, depending on the strain grow space this will vary between 10L – 15L pots, I personally recommend Airpots if you’re after very healthy plants. (healthy plants yield bigger)
If you are using photoperiod this will also be different depending on strain, grow space and how long you veg for, they can be transplanted into gradually larger pots ending up in anything up to 20L.

Check once or twice a day to ensure that the paper towel never dries out. If you need to add water, make sure that you always drain out any standing water. Keep the seeds covered and at the correct temperature. They should sprout in a few days.

My Seeds Germinated, Now What?

For the paper towel, you actually want to use the cheapest brands. More expensive towels are more porous, which makes it easier for the delicate root to get stuck and tear off when transplanting the seedling.

Hope this helps clarify a few things for the first timers, 19oz on one auto and at least double that on a photo dry weight were some of my best yields so look after your babies and they will look after you

At this point, the seeds will want light, and lots of it. Even if they are still beneath the soil, you can go ahead and turn on your grow light.

You can turn the grow light on once the seeds have sprouted and they are in the soil or growing medium. Even if the plant is still not visible, the heat from the grow light will actually help warm the soil, which encourages the plant to grow.