New Grower vegging going too slowly

[user name]

Hey. My plants are not vegging fast enough or getting big enough, they are always small. I use LST but still.... I use and LED indoor soil. I use conservative amount of nutrients during flower, 5 gal pots, watered well but not too often once every several days. I am growing sativa dom. hybrid jack herer.

One problem is low humidity, below 50%, maybe much lower because my exhaust fan is 240cfm and my tent is like 36"x20"X60" or something like that. Could this be causing my problem? I guess there is one way to find out, I will raise the humidity by adding a bucket of water to the tent. My photo plants have been vegging for almost 2 months and they aren't 12 inches tall. My autos end up about 15-24" tall.

 

[blessedinwashington]

24" is about right for a lot of autos. Anywhere from 15" to 5 feet and each size is right for that plant. I have two White Widow XXL's that are coming down this weekend and one is only 24" or so and the other is 60".

What size of LED are you using?

What type of grow medium are you using?

What nutes are you using?

Those are all things we need to know to help you.

I wouldn't think it is humidity as my room is never above 50 % and often down in the 30 range.

 

[mauricem00]

you should post this question on the live help forum https://www.autoflower.org/f164/afns-live-help-thread-staff-only-replys-30723.html. low humidity can slow growth. try hanging a wet towel in there.if your lights are too close that can slow growth as well. most people that grow with leds place them 1 1/2 to 2 feet above the plants (45-60 cm).I am sure the folks on the staff help forum can give you a lot of good advice.they really know autos

 

[yodabuds]

Hi, welcome to AFN! Without knowledge of the led in use and exact genetics etc kind of hard to give you a definite answer, but I've noticed personally with led in veg it tends to produce tight node spacing and can make for some squat ladies... Maybe raise your light higher? It's always a hit or miss for me how plants (seedlings) do under the LEDs.... Have found the t5's so far have given me the best vegging.... Hopefully some pics and more info we can square you away :karma Cloud: for some big girls!
:Sharing One:

 

[Muddy]

As has already been stated, we really need more details to help you. One thing that jumped out is your pot size and how often you are watering. Five gallon pots are overkill for most dwarf auto strains. Usually 3 gallon are sufficient unless you are growing super autos or some of the bigger strains like Think Different. Small plants in pots that large do not need water every few days. MJ likes to go through wet/dry cycles and once watered, shouldn't be watered again until the soil is nearly dry. If you have been watering that frequently it's quite possible they are staying too wet for too long. That will cut off needed oxygen from the roots and the result will be smaller, or stunted, plants.

 

[user name]

Well I raised humidity a lot and not much happened, so I put them into flower. Thanks for the advice about watering muddy, from now on I will stick my finger in the soil and make sure its dry before watering. my LED is 160w actual draw, i think 200w is the claim. I am using normal soil out of the bag, and no nutes during veg, except for a very small amount of some Dr earth biotic bacteria stimulation for the soil. I should add there is no nute problem, the leaves are finely colored.

I'm just going to finish these plants and try again. Its annoying because I once grey a 3 ft tall auto in a toy bucket under a 30-50w cfl, and now I have a 160w LED, smart pots, and my plants are 1/3 the size :no:

 

[Muddy]

LOL, around here there is no such thing as "normal" soil. What is in the mix? Any amendments like composted manure, humus, guano or worm castings? Five weeks is a long time to go and not feed them, especially in veg where they put on most of their height. The problem with small plants in big pots is that it takes too long for them to dry out, so feedings that might other wise be given, and that the plant may need, are missed. If the soil is very rich in amendments it could be too hot, which can also stunt plants. The finger in the soil isn't the best way to judge when to water. That only tells you what's going on in the top few inches and not how wet the bottom of the pot is. The best way is to get a feel for how heavy they are when they are almost completely dry and only water again when they feel that way.

 

[jokidd]

LOL, around here there is no such thing as "normal" soil. What is in the mix? Any amendments like composted manure, humus, guano or worm castings? Five weeks is a long time to go and not feed them, especially in veg where they put on most of their height. The problem with small plants in big pots is that it takes too long for them to dry out, so feedings that might other wise be given, and that the plant may need, are missed. If the soil is very rich in amendments it could be too hot, which can also stunt plants. The finger in the soil isn't the best way to judge when to water. That only tells you what's going on in the top few inches and not how wet the bottom of the pot is. The best way is to get a feel for how heavy they are when they are almost completely dry and only water again when they feel that way.

I use a moisture Metter 6 bucks on amazon