AnOpenStoma
New Member
Hello all, second grow, first hydroponic, have a rusty leaf problem that won't seem to let up.
Technicals:
Problem - Leaves rusting (mainly new growth on tops, lower older growth also effected but not quuuiite as extreme), curling upwards into a whole warp, causing effected leaves to drop, going from green to dropped within 3 - 6 days
Plants - 4 sativas, sinsemella
Medium - rapid rooters in 5x3 rockwool in perlite
Ages - Plants grown from seed, started in mid-June, 2 months and 10 days since sprout
Technique - Bubble Bucket + Screen-of-Green; 3 airstones (1 long rectangular, 1 short rectangular, 1 round-shaped, and just an airpump line bubbling the top of the water)
ScrOG Height - 10 inches
Grow tent - 6'h x 3'w x 2'd
Phase - Veg
Light - 400W MH
Cycle - 16/8 1:30PM - 9:30PM dark (for the sake of the summer heat)
Distance between tops and light - about 11 inches
Temps - 81 high, 70 low, average 75 (74 - 77 during the dark cycle)
Humidity - 35% low, 60% high, average in the 50-55% range
pH - Nutrient solution prepared to 5.8, change every other day, raised to 6.2 by changing time
Fertilizers - Dr. Bush's Kangaroots Root Drench (1 cup), Fox Farm Grow Big (1/2 cup, soil-based, not the hydro one), and Fox Farm Big Bloom (haven't used very much at all, just worth mentioning)
Additives - Great White (roughly 1.75 scoops every change), Botanicare Aquashield (roughly 3 - 5 teaspoons every change)
Watering Cycle - Ferts and additives for 2 weeks, plain pH'ed water + additives for 3 - 4 days in between
Water - Tap water, does not sit over night, directly from the faucet to my bucket, mix in ferts and additives and pH, into the tent
Circulating Fan - One clip-on fan that sends a breeze to the plants in front of it, but doesn't quite penetrate to the other side, so some leaves dance, many are motionless
I've been running this bubble bucket for just less than 2 months, which is an 18-gallon tote filled with my nutrient solution, with a much smaller and shorter tote set inside the 18-gallon tote's lid. Now the smaller tote is a makeshift net pot with drilled holes all along the bottom. A thin layer of pea gravel lines the bottom of the tote-net-pot, then the rest is filled up with perlite.
In this tote-net-pot are 4 female sativas (so 4 plants in the same pot). The plants have thick stem bases, have grown into the 10"-tall screen and been trellised through the screen for the last 2 1/2 weeks. The bottom-most branches are almoooost to the screen. The roots hanging from the netpot are pretty white, however at the spots where they are hanging from the net-pot holes they are obviously brown, in some areas dark-brown. The roots make a filled-out mass that's about twice the size of the tote-net-pot.
I had a root-rot problem about 4 weeks ago with brown slime covering the roots, and the use of Great White + Aquashield killed the rot and I got whiter roots back.
For the last 3 weeks dozens and dozens of leaves have been developing brown spots. The spots will occur anywhere on any leaflet, and they progress into large rusty splotches, curling the leaf upwards and causing the leaf to warp and twist, and eventually fall off.
What I've done about it so far:
1 - I tried inoculating the medium with a solution of water and Great White + Aquashield (since been flushed out)
2 - I flushed them all very well (5 - 6 times more water than the tote-net-pot could hold into a waste bucket, not the res)
3 - I checked for bugs for hours, and I actually found one little sprinkle-sized champagne-colored round-shaped loner moving about an inch-per-minute on the bottom of a leaf. Then I sprayed the plants and the medium surface down with the Safers 3-in-1 (insect, mites, fungus) This was a week and a half ago, since I haven't spotted anymore
4 - I gave them a foliar feed with 1-teaspoon of epsom salts in an 800-milliliter spray bottle (just regular-sized one for you visual people)
5 - I topfed with calcium-enriched water (I added crushed mucus-free eggshells) and even added some of this to the res
Here's 3 pics, 2 of the set-up in general, and 1 of the rust in question.
Much obliged to whoever can throw me some advice, I'm gonna flower as soon as this is resolved!
I'm willing to try anything at this point to save my leaves from dropping more.
In the name of all that is green and holy, help!!
Technicals:
Problem - Leaves rusting (mainly new growth on tops, lower older growth also effected but not quuuiite as extreme), curling upwards into a whole warp, causing effected leaves to drop, going from green to dropped within 3 - 6 days
Plants - 4 sativas, sinsemella
Medium - rapid rooters in 5x3 rockwool in perlite
Ages - Plants grown from seed, started in mid-June, 2 months and 10 days since sprout
Technique - Bubble Bucket + Screen-of-Green; 3 airstones (1 long rectangular, 1 short rectangular, 1 round-shaped, and just an airpump line bubbling the top of the water)
ScrOG Height - 10 inches
Grow tent - 6'h x 3'w x 2'd
Phase - Veg
Light - 400W MH
Cycle - 16/8 1:30PM - 9:30PM dark (for the sake of the summer heat)
Distance between tops and light - about 11 inches
Temps - 81 high, 70 low, average 75 (74 - 77 during the dark cycle)
Humidity - 35% low, 60% high, average in the 50-55% range
pH - Nutrient solution prepared to 5.8, change every other day, raised to 6.2 by changing time
Fertilizers - Dr. Bush's Kangaroots Root Drench (1 cup), Fox Farm Grow Big (1/2 cup, soil-based, not the hydro one), and Fox Farm Big Bloom (haven't used very much at all, just worth mentioning)
Additives - Great White (roughly 1.75 scoops every change), Botanicare Aquashield (roughly 3 - 5 teaspoons every change)
Watering Cycle - Ferts and additives for 2 weeks, plain pH'ed water + additives for 3 - 4 days in between
Water - Tap water, does not sit over night, directly from the faucet to my bucket, mix in ferts and additives and pH, into the tent
Circulating Fan - One clip-on fan that sends a breeze to the plants in front of it, but doesn't quite penetrate to the other side, so some leaves dance, many are motionless
I've been running this bubble bucket for just less than 2 months, which is an 18-gallon tote filled with my nutrient solution, with a much smaller and shorter tote set inside the 18-gallon tote's lid. Now the smaller tote is a makeshift net pot with drilled holes all along the bottom. A thin layer of pea gravel lines the bottom of the tote-net-pot, then the rest is filled up with perlite.
In this tote-net-pot are 4 female sativas (so 4 plants in the same pot). The plants have thick stem bases, have grown into the 10"-tall screen and been trellised through the screen for the last 2 1/2 weeks. The bottom-most branches are almoooost to the screen. The roots hanging from the netpot are pretty white, however at the spots where they are hanging from the net-pot holes they are obviously brown, in some areas dark-brown. The roots make a filled-out mass that's about twice the size of the tote-net-pot.
I had a root-rot problem about 4 weeks ago with brown slime covering the roots, and the use of Great White + Aquashield killed the rot and I got whiter roots back.
For the last 3 weeks dozens and dozens of leaves have been developing brown spots. The spots will occur anywhere on any leaflet, and they progress into large rusty splotches, curling the leaf upwards and causing the leaf to warp and twist, and eventually fall off.
What I've done about it so far:
1 - I tried inoculating the medium with a solution of water and Great White + Aquashield (since been flushed out)
2 - I flushed them all very well (5 - 6 times more water than the tote-net-pot could hold into a waste bucket, not the res)
3 - I checked for bugs for hours, and I actually found one little sprinkle-sized champagne-colored round-shaped loner moving about an inch-per-minute on the bottom of a leaf. Then I sprayed the plants and the medium surface down with the Safers 3-in-1 (insect, mites, fungus) This was a week and a half ago, since I haven't spotted anymore
4 - I gave them a foliar feed with 1-teaspoon of epsom salts in an 800-milliliter spray bottle (just regular-sized one for you visual people)
5 - I topfed with calcium-enriched water (I added crushed mucus-free eggshells) and even added some of this to the res
Here's 3 pics, 2 of the set-up in general, and 1 of the rust in question.
Much obliged to whoever can throw me some advice, I'm gonna flower as soon as this is resolved!
I'm willing to try anything at this point to save my leaves from dropping more.
In the name of all that is green and holy, help!!
