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germinating marijuana seeds under lights

The only time MH or HPS really makes sense is if you keep your plants in the same space from seed to harvest, i.e. you do not have a separate area for seedlings.

Once they have sprouted, they will need a lot of light — 18 hours a day, to be exact (though you could even give them 24 hours of light per day).

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.

Put your seeds on one half of the paper towel and fold the other half over them, so that they are covered. Then take the second plate and put it upside down on the bottom one, forming a dark cavern between the two plates for the seed to germinate.

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.

lower cost than using propagator
peat pellets (or rapid rooters) still offer the best chance of success, even without a propagator
less control than with propagator
if using a DIY propagator, requires time to construct

Metal halide light is better for seedlings than HPS light, since they need cooler light with more blue light than red.

First time grower here. I didnt germinate I just put them in soil. Do I need to put light on them or just grow till till I can see them a little and then put light??

You should make a YouTube video demo ?

Thank you so much for sharing your experience.

When to plant your cannabis seedlings outside?

I hope you continue to enjoy the blog.

Ciao Susie il consiglio che ti do io x esperienza trentennale, pianta direttamente nel terreno, è più difficile ma dà risultati del 30% in più specie nella quantità. Allora metti il seme in acqua almeno 15 ore,dopo pianta il seme (anche a 23 centimetri sotto terra) innaffia bene e dopo ogni giorno inumidisci fino a quando non spunta la piantina, una volta germogliata io personalmente non la innaffio x almeno una settimana (dipende dalla temperatura esterna) ha lei i nutrienti x sopravivere almeno 10 giorni. E poi vedi se cresce più forte. Io faccio dei mostri di 6 metri

If using normal fluorescent tubes (18-36w), seedlings can be kept within a few centimetres of the light source.

“When can cannabis seedlings be put under lights or in the sun?” is a common and sensible question that is often asked by novice cannabis enthusiasts after germinating seeds indoors under lights.

If it has not, the seeds should be moved to a different environment as too much water can drown them. 24-36 hours is the maximum recommended time for this and is only needed on seeds that have dried out for a long period.

Setups involving many pellets on a warming rack are colloquially known as “germination stations” and are very commonly used in both amateur and professional grows. Very little trauma to the seed can occur here, and the trauma of transplantation becomes a non-issue.

Example of soaking seeds in water, Credit: Wikimedia Commons

2. Soaking Overnight

The concept here is to use a piece of growing medium, such as widely available peat pellets, and to plant the seeds directly into it.

When older, dried out seeds need to be revitalized, a good soak can wake them up when done properly.

Duds are a common issue, even with quality cannabis seeds. Taking care to rear these fledgling plants in a more controlled environment than dirt can help reduce the amount of non-sprouting seeds and save the grower from some amount of disappointment.

Getting cannabis seeds to sprout is known as germination. In nature, this happens underground, but it isn’t an entirely reliable process in a well-organized grow-op.