Iron or Calcium Defieciency

fatbottoms

New Member
I have a plant - Querkle x Space Cheese that is about 2 months in veg and it's leaves have started to seriously turn yellow, brown and crispy on the ends...mostly on new growth and concentrated in one quadrant.

It's been getting worse since the last week or so.

Originally, I was going to trash the plant so I stopped paying attention to the plant after I discovered what I thought were pollen sacs, but since then, I've also discovered preflowers and so I believe this plant's a hermie...and if I remember correctly, this was bagseed from a suspected hermie plant.

This was the healthiest plant that I had and grew very fast, but after I fim'd the plant after a month, it seemed to have slowed it's growth considerably...I did get 6 shoots growing out of it.

Using:
Fox Farms Happy Frog and trio of nutrients in 4 gal. bucket.
T5 4' 8 bulb - Vegged with 6500k bulbs and now have a mix of bloom and veg bulbs.
No nutes for month then started Grow Big and Big Bloom according to FF dosage, but found that the plants didn't like it so I cut it in half and feed it nutes every other watering.

Problems with the plant:
Infested with fungus gnats after I tried the molasses supplement. The entire topsoil was crawling with them...I think I've managed to get rid of most of them and don't see them everyday.

Soil became extremely hard and crusty with poor water absorption with the water pooling on top of the soil. This was due to the cow manure/compost that I put on as topsoil to cover some bare roots. Now, I've been trying to massage the pot to break up the soil which seems to help with the absorption. The plant is 2 months old in veg and I've never flushed, although on my last watering, I gave it twice the usual amount of water.

I believe the yellowing started after about a month, and it's gotten progressively worse since then.

What's causing the yellowing...iron, calcium deficiency?

Should I get some Cal-mag?
 

Alexander Supertramp

Well-Known Member
Snaps is right on the mark. Magnesium deficient. Some of the big fans have a almost blue look too them. You haven't been feeding lots of ammonia nitrogen have you?
 

fatbottoms

New Member
Snaps is right on the mark. Magnesium deficient. Some of the big fans have a almost blue look too them. You haven't been feeding lots of ammonia nitrogen have you?
The only nutes I've fed them are the FF Big Grow and Big Bloom after a month in half doses every other watering.

When I transplanted to a bigger pot, I also mixed in about a third of the cow manure/compost with the Happy Frog...this was what I topped the pot with also which became hard and crusty.

I don't think I'll be using this stuff again.

I just wanted straight cow manure, but nobody sells it anymore around here.

Also, I wanted to ask about how plants should look after a nute feeding.

After I gave them a full dose of FF on the first feeding, all the plants looked droopy so I cut the dose in half and started feeding it every other watering.

Shouldn't plants look perky and reaching for the light after a nute feeding, just like they do when I just give them plain water?
 

Alexander Supertramp

Well-Known Member
The only nutes I've fed them are the FF Big Grow and Big Bloom after a month in half doses every other watering.

When I transplanted to a bigger pot, I also mixed in about a third of the cow manure/compost with the Happy Frog...this was what I topped the pot with also which became hard and crusty.

I don't think I'll be using this stuff again.

I just wanted straight cow manure, but nobody sells it anymore around here.

Also, I wanted to ask about how plants should look after a nute feeding.

After I gave them a full dose of FF on the first feeding, all the plants looked droopy so I cut the dose in half and started feeding it every other watering.

Shouldn't plants look perky and reaching for the light after a nute feeding, just like they do when I just give them plain water?
You always want composted manure when using as a soil amendment. A 1/3 manure is quite a bit. That would explain the blue tinge to the leaves and Magnesium deficiency.. It would also explain the crust on top of the medium. Its not any of the FF products fault. I wouldn't be feeding them anything at all. Just some foilar feedings of Epsom Salts. Plain water into the pots.
 
Top