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starting weed seeds with led lights

Concernant les tubes fluorescents normaux ( 18-36 W ), que me conseiller vous ?
Tubes normaux de couleur blanche, ou tubes horticoles de couleur rosée ( comme ceux qu’ont peut trouver sur les aquariums ).
Merci pour vos réponses.

Thank you so much for sharing your experience.

If the basement is damp that’s why you would have mould. Yes totally get a dehumidifier! Run it so you get the basement at the right humidity first, It will dry out the room and give you a stable base. Then aim to keep the grow room around 55% I think and around 24 degrees and have several small fans that can be moved about easily. It’s also really useful to keep the humidity down if you’re using it to dry too. That’s when you have to really worry about mould! But on your bud not the room! Good luck ?

When to plant your cannabis seedlings outside?

With best wishes,

Good afternoon Jon,

“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 outdoor temperatures are suitable, seedlings may be acclimatised to direct sunlight by giving them progressively longer daily exposure to outdoor conditions.

The following methods are all tried and true alternatives to the direct planting of the seeds. However, growers should take note of the color of their seeds before attempting any germination, as immature seeds will not be successful.

There are a few techniques to consider when germinating cannabis seeds.

1. Paper Towel Method

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.

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.

Cannabis seeds only need three ingredients to be able to grow: heat, water, and air. Anything that provides those will result in a sprout, as long as the seeds are viable, so some precautions should be taken when storing seeds in warm or humid climates.

LEDs produce less heat, which means less stress on your plants—so you can move your lights closer to your plants without any negative effects. Higher light intensity translates to higher yields!

As your seedling grows taller, stronger, and approaches the most robust part of the vegetative growing stage, you can then gradually increase the light intensity.

The biggest advantage of these standard LED lights is their price point. Most are manufactured overseas, and you can find them aplenty on eBay and other places online. A disadvantage is that their quality is often lacking; they can be less than reliable, and their light output is often lower than other types of LEDs, leading to lower yields. To remedy this, we’re now seeing standard LEDs begin to include COB LED lights or UV LEDs in addition to the red and blue, which can help with yield and bud quality.


When you flower indoors on a 12-12 schedule, it is important that the 12 hours of darkness are not interrupted. So make sure that your tent or greenhouse doesn’t have any light coming in from outside. This would otherwise revert your flowering plant back to veg or potentially cause other issues such as hermaphroditism.

Spread-style LEDs are comprised of a large number of small LEDs that are spread out on a larger panel or board. There are also spider-style LEDs and rack-style LED lights, which are widely used in commercial greenhouses. The spider-style LED lights don’t use flat panels, but spider-like “arms” with LEDs instead. The main advantage of spread-style grow lights is that they are among the most energy-efficient LEDs, which means you can get the most light for the wattage you’re using. A disadvantage is that quality spread-style LEDs, such as the spider-style lights, can be extremely expensive.

Photoperiodic cannabis starts to flower in late summer when the daylight hours naturally begin to diminish. Indoors, the grower is responsible for inducing bloom by setting the light schedule to 12 hours of light and 12 hours total darkness. If your LED light has a flowering switch, turn it to flowering mode.

With less heat produced by lights, the soil in your pots will stay moist for longer, thus reducing the amount of times you need to water. If you’ve just switched from HID to LED and are used to your plants drinking quite a lot, you now need to be careful with your new watering schedule under LED, otherwise you might overwater your ladies.