what's causing this?
- Thread starter smc5w
- Start date
Hugo Phurst
Well-Known Member
I've got the same thing, my plant is around the same development as yours. I thought cal/mag, treated but no difference. Now I'm treating it like a potassium deficiency, but the suppliments that I've been using should have taken care of that.
Maybe it's just the way the leaves give up sugars to the buds.
If you figure it out let me know.
Maybe it's just the way the leaves give up sugars to the buds.
If you figure it out let me know.
brewing up
Well-Known Member
looks like nute burn
missnu
Well-Known Member
If you are overfeeding bloom nutes you can cause a lock out of nutes, as opposed to nute burn due to nitrogen most commonly seen in veg and early flower...that looks like a lockout of nutrients causing a potassium deficiency. So just feed with plain water for one or 2 waterings...then resume with less bloom nutes, either a lower concentration and the same schedule, or the same dose less often...so if you are giving 3 tsp of bloom ferts every watering then give only 1.5 per watering, or give 3 and then none the next time...
Californicater
Active Member
Same here. And I know my PH is low, I'll never not use Dolomite again. I cant get my soil PH runoff to test above 6.
scroglodyte
Well-Known Member
check out those hooked leaves in background. can we have a pic of entire plant?
Californicater
Active Member
I pH my water to 7.
smc5w
Member
The plant pictured is 18 days into flower. I'm growing in fox farm soil, with fox farm nutes. And the Ph varies between 6 and 7.
ru4r34l
Well-Known Member
Info from Marijuana Plant Problems
regards,
This looks somewhat like what your facing? also Mn deficiencies are alot like Mg but Mn usually has spots accompanied with it. Mn gets locked out when the pH is too high, 7 is pretty high IMOMarijuana Plant Problems said:Magnesium is a component of the chlorophyll molecule and serves as a cofactor in most enzymes.
Magnesium deficiency will exhibit a yellowing (which may turn brown) and interveinal chlorosis beginning in the older leaves. The older leaves will be the first to develop interveinal chlorosis. Starting at leaf margin or tip and progressing inward between the veins. Notice how the veins remain somewhat green though as can be seen in figure 15.
Notice how in Figure 16 and 17 the leaves curl upwards like they're praying? They're praying for Mg! The tips may also twist.
This can be quickly resolved by watering with 1 tablespoon Epsom salts/gallon of water. Until you can correct nutrient lockout, try foliar feeding. That way the plants get all the nitrogen and Mg they need. The plants can be foliar feed at ½ teaspoon/quart of Epsom salts (first powdered and dissolved in some hot water). When mixing up soil, use 2 teaspoon dolomite lime per gallon of soil.
If the starting water is above 200 ppm, that is pretty hard water, that will lock out mg with all of the calcium in the water. Either add a 1/4 teaspoon per gallon of epsom salts or lime (both will effectively reduce the lockout or invest into a reverse osmosis water filter.
Mg can get locked-up by too much Ca, Cl or ammonium nitrogen. Don't overdo Mg or you'll lock up other nutrients.
regards,
bombasticson
Active Member
looks like something to do with the ph cuz nute burns aren't like that chek this out http://www.greenmanspage.com/guides/plant_abuse.html
ru4r34l
Well-Known Member
bombasticson
Active Member
to solve ph problems man just use rain water I never checked my ph or had any ph problems with rain water...