Leaves dying from the bottom. Tips clawed down, rust color.
- Thread starter BorgCube
- Start date
Silentvirtue
Well-Known Member
pH is wrong 5.5-5.8 in coco or hydro or soilless mixes
6-6.5 in soil.
Looks like youve started having a cal mag issue prob due to slightly low nitrogen levels or unbuffered coco.
Sort the PH first.
6-6.5 in soil.
Looks like youve started having a cal mag issue prob due to slightly low nitrogen levels or unbuffered coco.
Sort the PH first.
Tuckatan
Well-Known Member
What coco are you using? Is it buffered?
make sure you’re feeding cal mag with every feed/water. It does look like it could be aN early Ca deficiency.
Coco requires a PH range of 5.5 - 6.5. You want to aim for a PH of around 5.8 until you get into flower, at which point personally I raise to 6.2 to help the plant assimilate the most required nutrients. Also worth checking your PH meter calibration to be sure.
what nutes are you feeding right now, and what is your water source?
make sure you’re feeding cal mag with every feed/water. It does look like it could be aN early Ca deficiency.
Coco requires a PH range of 5.5 - 6.5. You want to aim for a PH of around 5.8 until you get into flower, at which point personally I raise to 6.2 to help the plant assimilate the most required nutrients. Also worth checking your PH meter calibration to be sure.
what nutes are you feeding right now, and what is your water source?
teddy bonkers
Well-Known Member
using distilled water?
BorgCube
Member
Thanks for helping!
1. Coco coir is buffered, was made with these instructions/video:
www.cocoforcannabis.com
2. I am feeding CalMag with every feeding, I've been following these instructions here:
www.cocoforcannabis.com
Solution consists of:
a. Mixing calmag and nutrients per bottle instructions (am using the advanced nutrients line. Voodoo Juice, flora/bloom/grow, B-52)
b. Diluting to a specific EC, which is slowly ramped up during the grow
c. Fixing pH on the diluted solution to a specific target. Dr. Coco specifically targets 6.1-6.2
3. Water source is an RO filter that we have in the kitchen, this guy: https://www.theperfectwater.com/Home-Master-hydroperfection-Reverse-Osmosis-Water-Filtration-System.html
I've done a foliar spray w/Calmag at .8 EC just now, hopefully this helps. Maybe water with just Calmag every second watering?
1. Coco coir is buffered, was made with these instructions/video:
Coco Coir Bricks - How to Prepare and Buffer Coco Coir - Coco For Cannabis
This tutorial covers the process of selecting, preparing & buffering coco coir. Includes perlite ratios & tips to make coco the best media for cannabis
www.cocoforcannabis.com
2. I am feeding CalMag with every feeding, I've been following these instructions here:
Growing Cannabis in Coco Coir with High Frequency Fertigation - Coco For Cannabis
Learn how to unlock the magic of growing cannabis in coco coir with high frequency fertigation! Guide to feed and water cannabis in coco like a pro!
www.cocoforcannabis.com
Solution consists of:
a. Mixing calmag and nutrients per bottle instructions (am using the advanced nutrients line. Voodoo Juice, flora/bloom/grow, B-52)
b. Diluting to a specific EC, which is slowly ramped up during the grow
c. Fixing pH on the diluted solution to a specific target. Dr. Coco specifically targets 6.1-6.2
3. Water source is an RO filter that we have in the kitchen, this guy: https://www.theperfectwater.com/Home-Master-hydroperfection-Reverse-Osmosis-Water-Filtration-System.html
I've done a foliar spray w/Calmag at .8 EC just now, hopefully this helps. Maybe water with just Calmag every second watering?
teddy bonkers
Well-Known Member
personally, I think you're overloading her, especially on the cal/mag. your nutes should have plenty of those that you don't need to supplement so much.Thanks for helping!
1. Coco coir is buffered, was made with these instructions/video:
Coco Coir Bricks - How to Prepare and Buffer Coco Coir - Coco For Cannabis
This tutorial covers the process of selecting, preparing & buffering coco coir. Includes perlite ratios & tips to make coco the best media for cannabis
2. I am feeding CalMag with every feeding, I've been following these instructions here:
Growing Cannabis in Coco Coir with High Frequency Fertigation - Coco For Cannabis
Learn how to unlock the magic of growing cannabis in coco coir with high frequency fertigation! Guide to feed and water cannabis in coco like a pro!
Solution consists of:
a. Mixing calmag and nutrients per bottle instructions (am using the advanced nutrients line. Voodoo Juice, flora/bloom/grow, B-52)
b. Diluting to a specific EC, which is slowly ramped up during the grow
c. Fixing pH on the diluted solution to a specific target. Dr. Coco specifically targets 6.1-6.2
3. Water source is an RO filter that we have in the kitchen, this guy: https://www.theperfectwater.com/Home-Master-hydroperfection-Reverse-Osmosis-Water-Filtration-System.html
I've done a foliar spray w/Calmag at .8 EC just now, hopefully this helps. Maybe water with just Calmag every second watering?
Silentvirtue
Well-Known Member
I feed every watering (every 3-4 days then every other day when bigger) I feed at 5.5 everytime. 6 is to high for coco. 5.8 max.
Physically speaking you should vary the pH between 5.5 and 5.8 every now and again to help with take up.
Physically speaking you should vary the pH between 5.5 and 5.8 every now and again to help with take up.
BorgCube
Member
The nutrient schedule I've been observing has been this one here:
Cannabis Nutrients - How to Mix Nutrient Solutions - Coco For Cannabis
Article and Video Tutorial for mixing nutrient solutions correctly. Explains order, ratio, strength (EC), and pH. Based on General Hydroponics Flora series
www.cocoforcannabis.com
He talks a bit more about EC targets here:
How To Set EC Targets - General EC Ranges for Cannabis in Coco - Coco For Cannabis - Plant Science
How strong should your nutrient solution be for cannabis? The strength should be determined by EC or PPM. We walk you through how to set EC/PPM targets.
www.cocoforcannabis.com
Silentvirtue
Well-Known Member
I also only buffer coco with Calmag. Normally 2/3ml per litre let it soak 24 hrs rinse and soak again for another 24 hours.
teddy bonkers
Well-Known Member
buffering it is one thing, but his guide is telling him to feed 1100-1200 ppms of mostly cal-mag EVERY watering, which is up to 5 times a day.lol
BorgCube
Member
Hm, PPM target the site instructs, at early veg is 550, with some adjustment if your tent runs humid or dry...
teddy bonkers
Well-Known Member
that's a lot of cal-mag, In my opinion, especially for such a little gal.
BorgCube
Member
Thanks, I'll study this!
teddy bonkers
Well-Known Member
All You Need to Know About pH and Nutrient Availability
Avoid nutrient lockout by reading this guide on pH and nutrient availability for hydroponics. Learn to grow food fast and cheap at home!
www.epicgardening.com
Tuckatan
Well-Known Member
You don’t want to let your coco dry out, that will give you issues, so once it looks dry on top, light brown, give it a water/feed.
It depends on your pot and plant size, it can vary significantly... though i use fabric pots so it dries a fair bit quicker than a plastic pot.
I don’t ever feed more than once a day though. Just give it a water/feed to 10-20% runoff when it’s looking dry on top. The worst thing you can do is overthink it! Give it steady nutrients and water when the top is dry, and keep your PH in check, and you will be golden!
Last edited:
BorgCube
Member
@teddy bonkers interesting, so the pH affects different nutrients at different ranges. Looks like the 6.0 to 6.5 range is most available?
teddy bonkers
Well-Known Member
exactly, as your medium dries, the ph should swing a little, offering nutes at optimal ph