Any idea what could be wrong here??

[jmj3480]

Hello

I recently planted 10 blueberry/trainwreck plants. The plants are currently 1.5 month old. 1 plant has shown signs of yellowing, brown spots and even a burnt feel to the leaves??

Here are my specs:
15 gal pots
70% Ocean Forest 30% Pro Mix, with several layers of Coco for drainage
2 1000 watt MH bulbs about 4 feet away(24hr period)
proper venting, room stays at 75 degrees and 60% humidity
just repotted into bigger pots last week. Have been watering with PH water only so far

watering as needed.(thorough water with drainage then wait to dry out)
Ive attached 3 pics

any help would be great thanks in advance​

 

[Hemlock]

If it were me I would rinse with cal mag and water ph'd at 5.8-6.0 So in five gallons of water add 30 ml of Cal mag
Reduce you lights to 20on 4 off.

 

[nick17gar]

If it were me I would rinse with cal mag and water ph'd at 5.8-6.0 So in five gallons of water add 30 ml of Cal mag
Reduce you lights to 20on 4 off.

i kinda agree with this. except id do 6.5pH water, 5.8 is 10x more acidic then 6.8(ideal for soil). i wouldnt rinse either, id generously water, but not actually flush. water til ya have a few cups of runoff per pot.
id also use nutes. Nitrogen heavy, and lots of micro nutes, especially calcium and magnesium.
the 20/4 cycle i think is great too, it gives the plants 4 hours of night, to promote some stretch, also, those 4 hours helps lower temps, and makes a big difference on the electric bill.

whats wrong? possible deficiencies of Nitrogen (likely), potassium (some is good during veg), calcium, magnesium, zinc, boron, sulfur... worry about adding lots of N, a little P, and upping the micro nutes. micro nute overfeeding is rare, the plant will not easily absorb excess micro nutes, so being a little generous with them is ok.

i like to feed nutes til i see a little overfeeding, then cutting back a tad. each plant is different, but you can tailor a solution mix that will keep them all happy.

 

[jmj3480]

thanks alot! didnt want to start using nutes yet because they were fresh potted in 15 gal last week. I was hoping the Ocean Forest soil would provide enough nutes for couple weeks. BUT looks like I might have too

also Im going to try the Advanced Nutrient Iguana Juice Grow....does AN carry a CalMag solution?? If not I have some General Organics CalMg left, should be safe to combine right?

 

[PotChimp]

I haven't used coco yet but I've heard that it throws the Ph of soilless mixes off. Have you measured the Ph? I've waterlogged a few plants and they looked like that before. Too wet of soil and the plant didn't take up nutes.

 

[Randm]

I've stopped using Fox Farm O.F. due to it being a bit hot for some plants, especially younger plants. It looks like a slight amount of nute burn could be the culprit. If it doesn't get any worse, don't worry too much, just back off of any feeding for a bit and see it that helps. Also 2000 watts for ten plants seems a bit of an overkill for vegging. I would use just the one lamp and go for 18/6 timmer on them. Let the pot dry out to the point that it's 'light' weight befor watering. It does not hurt to let the water go to the point of them drooping a little befor watering.

 

[Hemlock]

thanks alot! didnt want to start using nutes yet because they were fresh potted in 15 gal last week. I was hoping the Ocean Forest soil would provide enough nutes for couple weeks. BUT looks like I might have too

also Im going to try the Advanced Nutrient Iguana Juice Grow....does AN carry a CalMag solution?? If not I have some General Organics CalMg left, should be safe to combine right?

I fukin hate AN bu they do have a great calmag...called sensi cal mag bloom