mountain
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- 8
Looking for input on best way to facilitate recovery from heat stress and salts.
Large greenhouse plant (green crack), in well amended soil/coco/perlite blend, watered the week previous with RO + 500ppm calmag (1/2 tsp/gal) to prevent deficiencies caused by coco.
Misters cool the greenhouse, failed one afternoon, temps 100+.
Other plants did great. This one the emitters werent placed quite right, not much water near the center root ball.
This one the upper leaves taco'd up, lost most of their sheen, turned an olive type color. Lower leaves and tops shaded by the rest of the plant unaffected and lush. No wilting.
Looks a LOT like this except none of the brown/bright yellow on the background leaves (not my pic)
Tops look a lot like this, with more of the lighter green color at the bottom everywhere:
Seemed to even be some white salt deposits on some upper leaves.
Large ridges between veins on new growth and lots of curled leaf fringes - See bottom right pic here:
http://books.google.com/books?id=fERzFsZhdxYC&pg=PA256&lpg=PA256&dq=Marijuana Horticulture cervantes heat stress&source=bl&ots=t1RteuNJQm&sig=zHTnLHLsmUmldilIx24DXnk4p80&hl=en&sa=X&ei=CCYJUIn3FsaI2gWbo4XDBw&ved=0CEkQ6AEwAA#v=onepage&q=Marijuana Horticulture cervantes heat stress&f=false
Theory is that with hi temps, this one started to dry up, drank up most of the water in the soil. EC went up from the calmag salts, and with less water in the soil, salt concentration went too high.
Seems unlikely to be Mg related with this high of calmag. Prior to arriving at the above now apparently obvious theory, tried a small spot foliar treatment of Mg just to be sure - no affect. Tried some spot foliar treatments of micros, mild tiger bloom, kelp. No affect. Large plant, easy to do a few spot treatments and not affect the whole thing.
Foliared Thrive Alive. Flushed with some straight RO, watering with reduced 100ppm calmag to reduce salt buildup. Working to keep roots from becoming waterlogged (drinks much less). Fixed mister problem.
Few days later, upper leave stems showing a bit of purple. Taco'd leaves unchanged. Upper part of plant remains kind of olive. New growth appears succulent, less pronounced ridges, reduced leaf size and narrow, reduced vigor in upper growth. Lower growth remains lush and healthy.
Would like to do all possible to facility quick and full recovery.
Any input?
Would aspirin / salicylic acid be worth while? What recipe and best way to apply?
Chitosan (have crab meal on hand)?
Lots of kelp? Water/foliar?
Alfalfa tea?
Shade the hurt plant to reduce current stress? Very sunny days, very low humidity at night with misters off, high humidity and large humidity swings during day with misters on. Misters significantly wet the plant with pure RO. Other plants for the most part very happy, a couple of minor leaf fringe curls but very happy.
Thanks for help.
Large greenhouse plant (green crack), in well amended soil/coco/perlite blend, watered the week previous with RO + 500ppm calmag (1/2 tsp/gal) to prevent deficiencies caused by coco.
Misters cool the greenhouse, failed one afternoon, temps 100+.
Other plants did great. This one the emitters werent placed quite right, not much water near the center root ball.
This one the upper leaves taco'd up, lost most of their sheen, turned an olive type color. Lower leaves and tops shaded by the rest of the plant unaffected and lush. No wilting.
Looks a LOT like this except none of the brown/bright yellow on the background leaves (not my pic)
Tops look a lot like this, with more of the lighter green color at the bottom everywhere:
Seemed to even be some white salt deposits on some upper leaves.
Large ridges between veins on new growth and lots of curled leaf fringes - See bottom right pic here:
http://books.google.com/books?id=fERzFsZhdxYC&pg=PA256&lpg=PA256&dq=Marijuana Horticulture cervantes heat stress&source=bl&ots=t1RteuNJQm&sig=zHTnLHLsmUmldilIx24DXnk4p80&hl=en&sa=X&ei=CCYJUIn3FsaI2gWbo4XDBw&ved=0CEkQ6AEwAA#v=onepage&q=Marijuana Horticulture cervantes heat stress&f=false
Theory is that with hi temps, this one started to dry up, drank up most of the water in the soil. EC went up from the calmag salts, and with less water in the soil, salt concentration went too high.
Seems unlikely to be Mg related with this high of calmag. Prior to arriving at the above now apparently obvious theory, tried a small spot foliar treatment of Mg just to be sure - no affect. Tried some spot foliar treatments of micros, mild tiger bloom, kelp. No affect. Large plant, easy to do a few spot treatments and not affect the whole thing.
Foliared Thrive Alive. Flushed with some straight RO, watering with reduced 100ppm calmag to reduce salt buildup. Working to keep roots from becoming waterlogged (drinks much less). Fixed mister problem.
Few days later, upper leave stems showing a bit of purple. Taco'd leaves unchanged. Upper part of plant remains kind of olive. New growth appears succulent, less pronounced ridges, reduced leaf size and narrow, reduced vigor in upper growth. Lower growth remains lush and healthy.
Would like to do all possible to facility quick and full recovery.
Any input?
Would aspirin / salicylic acid be worth while? What recipe and best way to apply?
Chitosan (have crab meal on hand)?
Lots of kelp? Water/foliar?
Alfalfa tea?
Shade the hurt plant to reduce current stress? Very sunny days, very low humidity at night with misters off, high humidity and large humidity swings during day with misters on. Misters significantly wet the plant with pure RO. Other plants for the most part very happy, a couple of minor leaf fringe curls but very happy.
Thanks for help.
