**ULTIMATE LED TEST** *GLH Spectra 290* VS *Blackstar 500* VS *Hydro Grow LED 336X*
- Thread starter WeJuana
- Start date
DoctorCanna
Well-Known Member
Only on one top, their are two strains, 7 of the 8 plants are one strain a heavy unknown Indica probably 70/30 Indica/Sativa, whilst the other loner plant is a heavy Sativa, huge stretch giant like spider like branches with lighter bud sites. It had a little bleaching when I allowed it to grow all the way up to and touching the advanced led 180 watt light for a week or so. other than that I keep my lights within about 6" of the top canopy to allow for best penetration and my plants seem to just love it, with the largest colas developing nearest the lights. Cannabis plants under LED seem to me to grow tighter and denser than the few HID grows ive seen, I really hope I can continue to improve every crop and really get the most out of my lights.
All the plants took it pretty hard, I wouldnt judge this round by the lights. You have to take into consideration these plants had no Calcium throughout its 6 week veg or through the first 5 of flower. Yes I have been correcting the nutrients for the last week or so, but in the scheme of the whole process, that is but a small window of time. Its unfair to expect a performance from this round comparing to proper nutes. This next round should be much more conclusive as far as results that the lights produce.
Look at the Trinity Kush grow I have going.. the plant is doing awesome under the penetrator! Thats a plant with proper nutes.
maxpesh
Active Member
View attachment 1900362
This is a great but simple chart for Ph ranges and nutrient uptakr for Hydro and soil. Coco should always be the same Ph levels as hydro btw
This is a great but simple chart for Ph ranges and nutrient uptakr for Hydro and soil. Coco should always be the same Ph levels as hydro btw
The lights are 55" from the ground, about 24" from the canopy. Next round I will lower the lights about 12 inches, so after stretch they sit about 12" away.
DoctorCanna
Well-Known Member
Thats good WeJauana, my height method for any high intensity LED is much the same to my method for determining the height for an HID. Place the LED panel pretty high above the canopy for my 300 watt spectras I start 36 inches and for my blackstars and advanced I start 18 inches and allow the plants to grow up to the lights until they finish stretching then I move the leds as close as I can to the canopy until I have a comfortable compromise between coverage and intensity, usually somewhere between 4 - 12 inches from the tops, depending on plant size, # of plants, how long they vegged, stuff like that. And I have been getting good results, I haven't yet experienced any burning or bleaching, except for plants that have grown all the way to the glass, in that case expect bleaching.
Also my plants seem to be able to take as high of a ppm level as I suppose Im willing to spend on nutes. Thus far the average ppm reading on all of my res's hovers around 1000 ppm, but i have gone as high as 1300 ppm and as low as 650 ppm, and you can definitely tell the difference. For all of you using LED's keep your res around 1000 ppm's and your plants should show excellent growth. Ive also noticed tat my plants simply run through water, I usually have to add 1 to 1.5 gallons of water to each res every day/every other to keep them at the level they are supposed to be. My pH seems to always be somewhere between 5.2 and 6.6, with an average of 6.5. Using Fox Farm Tiger Bloom, GH Cal/Mag, AN Cha-Ching during last 4 weeks of flowering, and AN Bud Blood and Big Bud appropriately, and a small dose of H2O2 every week to keep my res's clean. My plants smell like straight candy, very fruity and very aromatic.
Keep up the good work, but please get your nutes right and your light distance and show us what these lights can do
Very exciting, I like your new journal! Sorry for my long post, I ramble!
hippy132
Well-Known Member
It will kill you, my first grow with 2 glh 180's and a 290 - I ph'd at 6.5 and wondered why I had issues and stunted growth, SUn #4 , should have been 6.0 --- I was sure it was the lites. Tossed them with 3 weeks left, now proper ph and using FFOF and straight water with little kelp in 3 gallon pots, doing better ... PH and NOT overwatering are indoor plants most worry IMO, so far...
I've been ph'ing constant at 6.5l and I am starting to believe thats causing problems as well. From now on I am going to rotate PH between 6.0 and 7.0 and keep it dynamic to get different ranges of uptake.
puffenuff
Well-Known Member
Yo wejuana, have you thought about trying coco? Easy, clean, quick to correct nutrient problems, and it will dry out faster than soil which is important to stay on a consistent feeding schedule since there isnt a lot of heat generated by leds to dry it up at a fast rate.
hippy132
Well-Known Member
going from 6.5 to 6.0 is a 50 times diff to the plant is my understanding so find the right one and stick with it as long as its in the limits shown. My big fu was not ph'ing the initial move from 4 inch pots to 3 gallon pots, and wetting down with to much water. Indoor needs are much diff, I am learning. If you are using Sunshine try 6.0.
I watered with 7.0 ro water tonight and all the plants seem to be happy. I think next watering I will shoot for 6.2-6.3 range and keep the ph changing constantly to uptake all the different nutes.
When I grow hydro I usually let my res flux from 5.5-6.5 and I rarely encounter any problems.
When I grow hydro I usually let my res flux from 5.5-6.5 and I rarely encounter any problems.
I came from using coco.. may be something I consider going back too. I have a pot with a Power Africa clone which i mixed 60% FFOF to 40% STG Hail, and its actually doing really well. I may consider switching to something like this pending the results.
maxpesh
Active Member
I use nothing else but coco now always at 5.8ph but once a week water at 5.5 ph just to make sure plant gets a good dose of Mn. Coco is brilliant and don't think I would use anything else now as it's so easy to adjust and flush etc. Put a teaspoon of GH mineral magic in every ten days and you get the taste of MJ grown in soil but the growth rates of hydro