Marijuana seedlings growing to slow...need second opinion's.

BabyAndaconda420

BabyAndaconda420

Well-Known Member
Daniel and Jessica said:
Now their curling up
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This looks like the result of excessive heat. When the the serrated edges of marijuana leaves curl like that, it's often a sign of heat stress from too high temperatures or hot spots.

When the problem is low humidity, the leaf will tend to fold in the middle, like a taco.

What's your temperature in your grow area? Is there a hot spot around these plants from the grow light?

You mentioned that this is happening to only some of your plants. If this is happening to the plants which are closest to your grow light, that's a hint that the problem may be temperature related.

If your light is simply too close, you can move the bulb further away from these plants and this issue may resolve itself. However, these leaves are showing symptoms of heat stress, without light stress (burning / spotting), so it's more likely that the light is a good distance away and the heat just isn't being controlled properly.

When growing with hot HID lights, good ventillation and an exhaust fan will go a long way. If the whole grow area is too hot, you will want to consider venting out all that extra heat.

Having good air movement, like a small fan in your grow tent blowing over the tops of your plants, can help prevent hot spots from forming directly under your grow lights.

In general, if it's too hot for you to be comfortable, it's too hot for your plant
 
Got4m2e0

Got4m2e0

Well-Known Member
If you are going to use CFL at least use a 27 watt and more than one bulb. Get the daylight type for the 6500K which will have a better spectrum for vegetative growth. The more the merrier with CFls and keep them within an inch of the plants with a light breeze.

For flower, get an HPS. You can use CFL, but the results won't be rock solid picture worthy buds. Shoot for he 2400K range of soft glow light bulbs.

Hope all works out for you. If you are really committed to growing I have to stress getting the proper equipment.
 
Airwalker16

Airwalker16

Well-Known Member
Vipars are shit. Get yourself some new soil. That Miracle grow is your problem. They don't need the amount of nutes that are in MG. Get a nice 4-8 lamp t5 or a 3500-4500k cob light.
 
Olive Drab Green

Olive Drab Green

Well-Known Member
Airwalker16 said:
Vipars are shit. Get yourself some new soil. That Miracle grow is your problem. They don't need the amount of nutes that are in MG. Get a nice 4-8 lamp t5 or a 3500-4500k cob light.
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MG isn't causing the stretch, it's his light.

He's right, though, OP. Don't use MG for cannabis unless it's their Nature's Care line. That's what I use. Your slow growth, however, is more than likely because you are growing with CFLs. I use a ViparSpectra 450w and stand by it. I also have two Lighthouse Hydro BlackStars. So far, I'm really noticing a difference between the two. The ViparSpectra is more effective. My 450w draws 203-206 at the wall, so it's efficient, too.
 
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