I have a 25w full spectrum LED bulb that I’m going to use to start on my new San Pedro seeds I have. The grow area is 2.12m^2 (1000 seeds) which is inside a cupboard with not extra light.
Would a 25w LED be sufficient for the first stages of my grow?
Growing San Pedro Seeds Under a 25w LED?
Re: Growing San Pedro Seeds Under a 25w LED?
Do you know how many lux your led makes?
Los Angeles, California (USA)
Zone 10b (yearly minimum temperature 1-5° C)
Fishhook cacti are like cats, they only like to be petted in one direction
Zone 10b (yearly minimum temperature 1-5° C)
Fishhook cacti are like cats, they only like to be petted in one direction
Re: Growing San Pedro Seeds Under a 25w LED?
I don't think so. This would give you about 500 lux. I consider 1k lux to be the bare minimum. But I also think you could plant the seeds in a much smaller area and get a more appropriate light intensity
Planting 1k seeds in 2 m² is about 20 square cm per seed. The 2" square pots I use have about the same usable area and I'd consider 15 seeds in one to be a light planting. 1000 seeds should take up at most an area the size of a sheet of paper, not 2 m² imo
Planting 1k seeds in 2 m² is about 20 square cm per seed. The 2" square pots I use have about the same usable area and I'd consider 15 seeds in one to be a light planting. 1000 seeds should take up at most an area the size of a sheet of paper, not 2 m² imo
Los Angeles, California (USA)
Zone 10b (yearly minimum temperature 1-5° C)
Fishhook cacti are like cats, they only like to be petted in one direction
Zone 10b (yearly minimum temperature 1-5° C)
Fishhook cacti are like cats, they only like to be petted in one direction
Re: Growing San Pedro Seeds Under a 25w LED?
I’ve only just noticed my mistake, the seed tray is 53cm x 40cm which comes out to 0.212 meters squared. Do you think the lights may be appropriate still or not, now knowing the real size of the tray?Shane wrote: ↑Tue Mar 24, 2020 10:01 pm I don't think so. This would give you about 500 lux. I consider 1k lux to be the bare minimum. But I also think you could plant the seeds in a much smaller area and get a more appropriate light intensity
Planting 1k seeds in 2 m² is about 20 square cm per seed. The 2" square pots I use have about the same usable area and I'd consider 15 seeds in one to be a light planting. 1000 seeds should take up at most an area the size of a sheet of paper, not 2 m² imo
Re: Growing San Pedro Seeds Under a 25w LED?
Ah that makes more sense. Yes I do think it's appropriate. If anything a bit too much light. I'd just watch the seedlings and if they look red and stunted move the light a bit further away
Los Angeles, California (USA)
Zone 10b (yearly minimum temperature 1-5° C)
Fishhook cacti are like cats, they only like to be petted in one direction
Zone 10b (yearly minimum temperature 1-5° C)
Fishhook cacti are like cats, they only like to be petted in one direction
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Re: Growing San Pedro Seeds Under a 25w LED?
For fairly slow growing spherical cacti seedlings, 1 seed per cm sq is plenty for at least a few months.
I typically sow about 50 seeds into containers a little over 5 cm x 10 cm.
So you could get these into a bit smaller space than our seed tray, possibly with too much light. I have a LED light on chains, so I can adjust it's height above the plants (hence it's intensity on the plants) easily. Start of a bit higher, then move closer to the seedlings as they get older.
If you aren't experienced at raising cacti, I'd split your 1000 seed into a few separate containers, maybe do a trial sowing of 50 or so and see how they go for (say) 3 weeks before trying any more. It's easy to make mistakes first time, and they can result in rapid loss of all or most of a batch of seedlings.
I typically sow about 50 seeds into containers a little over 5 cm x 10 cm.
So you could get these into a bit smaller space than our seed tray, possibly with too much light. I have a LED light on chains, so I can adjust it's height above the plants (hence it's intensity on the plants) easily. Start of a bit higher, then move closer to the seedlings as they get older.
If you aren't experienced at raising cacti, I'd split your 1000 seed into a few separate containers, maybe do a trial sowing of 50 or so and see how they go for (say) 3 weeks before trying any more. It's easy to make mistakes first time, and they can result in rapid loss of all or most of a batch of seedlings.