Hey Guys, I’m seeing some yellowing in my coco coir / perlite grow in solo cups. Some seem to be doing ok (8 days old) and the two oldest (10 days) have some yellowing starting and drooping to the leaves.
I began nutrients a few days ago at 1/4 strength Advanced Nutrients at about 6 PH. (Distilled water) I’m using the cheap testing with the tube adding 3 drops and getting a color so it’s iffy. hTe PPM reading was 182. I am giving about 30 ml in a circle around the seedling every other day. Not sure if I’m not giving enough nutes, an over water issue or what? Any help is appreciated.
I would start watering with nutes daily. First leaves coming in and roots are going down. I start in solos and at your stage I use a 60ml syringe and fill it a few times til I see a bit of water running out of the bottom. As your plant proceeds, watering to runoff will become important. You maybe could go half strength and monitor a few days. In coco over watering is not much of a concern. The coco should not go dry. Get a good ph and ec tool.
Your EC and PH are important. I have used Apera, Blue Lab and an ACI combo pen for backup. You can get both from reputable companies for about 100. I know that @lostgirl has a set that she likes.
As for feed I would go with the directions for your nutes. I use Mega Crop One Part and in early veg I am at 550 ppm plus 100 from tap, so about 650, that is what they recommend for early veg. I do adjust a bit based on how they look. There are Jacks 123 users that go full strength 1000 ppm pretty early. It depends what nutes you are using.
I think it all depends on your nutes. I use canna A and B with tap water with coco. If i even go near 1000ppm with most strains I get nitrogen toxcisity within a day or 2. But you gotta feel it out man. Better to air on the side of caution, better to see a little yellow then wake up to plants fried imo. Goodluck
That’s what I use. But I would get up higher, your plant is hungry.