Hey guys, 1st time posting here but i'll get right into it. This is my second grow from seed ( 1st being auto's "Think Different" ) and this grow is some random seeds a buddy gave me labeled 4x White Widow x Skunk#1 and 6 labeled "Chocolopez" 4x8 gorilla grow tent 2x 330 W Advanced LED full spectrum 10W temps range from 65 - 84 ( having trouble keeping night / day within 10 degrees of each other ) mix of happy frog / ocean forrest / sand / perlite Using California well water testing at about 6.8 untouched. Always drop if back a little when mixing nutes but water is def. harder than I'd like it to be. ( worried about possible buildups in the soil ) Germed under t5's planted into 7 gal buckets plants showed purpling in stems early on and eventually grew out of it although veg grow did seem rather slow. Started using organic nutes pretty late at 1/4 strength ( root stim + grow ) around 2 weeks Plants started doing much better and we raised the lights. Because of the stunted growth we decided to veg for quite a while. ( about 3 months ) Flushed 2 weeks ago when we were contemplating switching to 12 - 12 Started light flowering nutes along with more frequent waterings ( they started drinking a good amount in the last few days ) they are getting about 1 gallon each every 2 days. sometimes just water because i have been seeking some advice. PROBLEM : purpling of some stems with a darker green leaf color - phosphorus deficiency due to mineral buildup in soil? Or PH issue causing lockout ( frustrated w/ soil and the whole guessing game that comes w/ it ) Other larger plant shown in picture pre flowering seems to be turnin a very light green almost yellowish that has made me a little nervous. Nitrogen issue? Over / Under - feeding? Took some pics while they were awake and sleeping. Again there are 2-3 dif strains and some of the issues seem worse on certain plants but they are all receiving the same treatment and all share some of the same issues ( sorry if it gets confusing ) Thanks!<b> EDIT : the one that looks to be pre flowering was actually a male... pulled it today to check root structure...</b>
an under fed plant has a uniform naturally light green color to it...bend the plant over and see what shes got Keep a few green lights on in the night period to warm the place up
LED's compared side by side to MH & HPS lighting is very disappointing. Yield is diminished, plants take twice as long to begin showing pistils at flip. Had some plants to show sex in four weeks and some longer instead of two weeks. Yield is half to what HPS grows, I know ... done a side by side grow in the same room for comparison. Your plants look to be slipping in Mg.
fully aware of LED vs HPS, I am under certain power restraints. Will up cal mag in future feedings and will post more pics soon. ty guys appreciate the help.
Well IMO very dark green and purple stems are not necessarily related. The leaves don't seem too dark in the pics though. By the looks of things, Magnesium and or calcium is deficient. It's pretty much the most common deficiency I think, at least the one most posted about. Epsom salts(magnesium sulfate) and water make a great foliar spray. The great thing about foliar sprays is that they are quick to show results as the leaves absorb nutes 10 times faster than roots. Don't water with dissolved epsom salts as the salt will just build up. To me the one that looks the worst in terms of leaf color, I mean yellow/light green between leaf veins. looks overwatered. I find this can cause a plant to appear mg/cal def. I think it may be a ph thing as over water means no oxygen for the roots meaning low ph meaning lockout issues. Mg. has a very tiny ph window, the smalles Here's a good Cannabis specific, nutrient Ph chart [gallery]https://www.google.ca/search?q=soil+ph+chart&rlz=1C1ASUC_enCA560CA560&espv=2&biw=1680&bih=917&tbm=isch&tbo=u&source=univ&sa=X&ei=0wlDVfuTHorHogTsoYDoCQ&ved=0CBwQsAQ#imgrc=sDHLSu5UxF5QcM%253A%3B8XipfuBj79JWtM%3Bhttp%253A%252F%252Fwww.growweedeasy.com%252Fsites%252Fgrowweedeasy.com%252Ffiles%252FpH-nutrient-deficiency%252Fsoil-ph-chart-marijuana.jpg%3Bhttp%253A%252F%252Fwww.growweedeasy.com%252Fph%3B828%3B828[/gallery] Good luck man. Plaid
I apologize for the LED lighting throwing off the true colors but you can still get an idea of whats going on, took these tonight. I have been extremely careful as to not watering too much but i will pull back a little. Really appreciate the time and response man! will grab some other pics when lights go off tom. morning.
http://forum.grasscity.com/sick-plants-problems/1371271-help-4x8-led-grow-day-34-flower.html anyone? please?