1 have 5 plants all growing along the same fence. They were all looking well until yesterday. I noticed 2 plants are starting to yellow. The ph is 6.4, and they get weekly nutes (Advanced Nutrients), and daily watering of about 1L each. Do you think I’m underwatering maybe? But that doesn’t explain why only 2 plants are suffering…?
Pic 1: yellowing plants
Pic 2 & 3: close up of yellowing leaves
Pic 4: healthy plants
I’m thinking if you haven’t used calmag it is a good time to do so. Just and observation with my plants that they require calmag during the stretch. I’m thinking that could account for the yellowing leaves. If it’s not that using calmag won’t hurt anything. 1 tsp per gallon or 4 tsp per 5 gallons is what I do.
I think a better watering technique is to water until runoff then allow the pot to dry out before watering again. You can determine that pretty easily by lifting the pot. This will promote healthy root growth.
I personally would not add more soil I would just water it till water is coming out all around it then let it dry out for three or four days when in veg don’t drink as much as it well when it’s in the flower
I’m very late to this conversation, but I wanted to chime in re the smart pots in case its relevant for you next year:
They do indeed run off.
I’m using 20 gallon ones this year. My plants got between 1 gal. and 1.5 gallons every other day on average. (During cooler stretches I might reduce to every 3 days. On hot stretches, I sometimes go to 2 gallons.)
But my main point is, they do runoff when you soak them enough. Water comes out along the stitched seam, and all of the pot saturates and shows “wetness” when you give them a good soak.
Just wanted to mention that in case you use them again next year. Unlike plastic, you can water them deeply, and they do shed the overage.