I’m struggling with diagnosis of what seems to be multiple deficiencies.
I see chlorosis on old growth, interveinal.
Overall yellowing of all leaves. New growth coming out with already mushy black tips (necrosis) leaves curling downward on old growth and crispy edges on several old leaves.
I realize a lot of info would be needed to receive advice here but wondering if it’s best to start over and try to catch these things as they arise.
I haven’t learned any lessons to suggest the next time will be better which is disappointing. This could be feed issues and environmental even though I follow GH nute charts and monitor vpd and ppfd.
Important is just: up to 300 PPFD during germinating, 300-600 for veg and 500 - 1200 for bloom. Staying around the 1000 mark after the first two weeks of bloom is great.
And that if you don’t have a PAR meter, you can usually consult the specsheet of your lights manufacturer.
I hear you. And plants also grow when there is a slight deviation from these values. These are just the optimal values. If you want to reach your maximum yield, this is also important. In addition, the range of 500-1200 PPFD during the flowering phase for example is quite wide. Your plant will flower somewhere in between.The closer to the optimal, the denser your buds. The same goes for veg. Margin is a bit less tho’.
If you start seeing nutrient issues it’s best to start at the basics before jumping in with additional nuets IMHO.
IMPORTANT TO KNOW:
pH of your nuet/irrigations going in and drainage water
EC or ppm of your nute solution going in and drainage water
Once those parameters are OK you can go from there…
If these parameters are out of whack you’re going to see multiple nutrient deficiencies displayed by your plants and they are meaningless…the problem would be in the pH and EC…FWIW
Thanks, to clarify this is coco coir with GH nutes. Whats the acceptable EC and PH variance for runoff. Mine is always lower PH by about 1 to 1.5 points and about the same EC.
I probably jumped too high in concentration too soon, I’ll remember to slow it down next time. I think its easier to fix deficiency than toxicity.
I found a good article on buffering coco coir. When I buffered mine in strong cal/mag, I did not let it sit for 8 hours each time. It’s interesting that once the cation exchange takes place, coco won’t interfere with pulling cal/mag from the nutrient solution when feeding.
I don’t know I didn’t read all that chatter above. It didn’t seem relevant from the start. Without any photos first thing I would say is root rot. Overwatering. But that’s just me pulling a guess out of my ass. Some photos would be very helpful. If I were you I would post some pictures so we can see what’s going on and get a better perspective of things and then we can probably help you and you can finish this grow and learn a whole bunch even though it might not produce much.
Or you can start over and instead of starting with Coco and adding all this crap to it just buy Pro-mix HP. You can start with this stuff straight out of the cube and your plans will be good for a week or two with nothing but water. Then you can start your nutrients according to their chart.
@PreyBird1
What do you think about the original question way up top…
@happilyretired i was going to say root rot also. And way overwatered at the same time but also i have seen this when plants sit in water rich with nutrients. Like water drip saucers getting water full of nutrients and the plant just sitting in it. I got to see pics of this to better understand. Because i feel like there is more we need to see to diagnose like cold enviroment because of black mushiness on new growth? Or maybe stagnant air. Its got my attention for sure. I only use pro mix or coco. But coco is a back up for me if i run out of promix-hp. Coco has 20% air regardless of it being totally saturated. But add a bunch of nutes and you get issues fast. But buffering with cal mag is so easy. take a little cal mag and water and mix up the coco and water calmag mix. Interveinial? How would you know that?
Edit: #1 guess… there in fabric pots sitting in water catching saucers full of water/nutrients. Temps 68 or colder. fan on plants.
Guess #2 in plastic pots with drip trays under full of water and poor to little drainage. Some nutrients added that are causing a fungus in the rootzone because there not for coco. ??? Must have…Pics!
So, I called and end to this round. New growth continued to be necrotic. Here is one of the buckets for inspection. I don’t see anything funky, but they’re certainly not pearly white roots.
For now, these strawberries I started from seed a while back, and these 2 moringa trees (damn things get 30 feet tall). The moringa seeds were in my sister in laws purse for a year and every one of them popped. I will try to care for these until I can transplant outside.
