How much Cal Mag??

CanadianDank

CanadianDank

Well-Known Member
how much cal mag you guys using under led?

Im fairly new to led and finding one strain (growing two) to be looking deficient although i feel ive been feeding enough.

Theyre in soil under eb strips, watered with tap water (100ppm) and 8ml cal mag per gallon. fed a bit of gh mild grow blend at half strength twice within last two weeks. started looking like too much nitrogen so i have skipped that last few waterings.

started in a soilless mix by accident, didnt realized, and had ph problems two weeks ago. have repotted and shouldve solved that.

just wanted some second opinions, should i give some mag to the ones that look deficient?

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Chef420

Chef420

Well-Known Member
I’m in Toronto and was using tap water but running into magnesium issues. I’ve switched to R/O water now and add at 1ml/liter. I veg under T5’s but give them a double dose when I switch to the flower and leds. Seems to work for me. I grow in pro mix so soiless.
 
D

Dave455

Well-Known Member
CanadianDank said:
how much cal mag you guys using under led?

Im fairly new to led and finding one strain (growing two) to be looking deficient although i feel ive been feeding enough.

Theyre in soil under eb strips, watered with tap water (100ppm) and 8ml cal mag per gallon. fed a bit of gh mild grow blend at half strength twice within last two weeks. started looking like too much nitrogen so i have skipped that last few waterings.

started in a soilless mix by accident, didnt realized, and had ph problems two weeks ago. have repotted and shouldve solved that.

just wanted some second opinions, should i give some mag to the ones that look deficient?

View attachment 4231513
Click to expand...
calmag recommends 2-3 ml per gallon ! 8 ??
 
Kushash

Kushash

Well-Known Member
CanadianDank said:
how much cal mag you guys using under led?

Im fairly new to led and finding one strain (growing two) to be looking deficient although i feel ive been feeding enough.

Theyre in soil under eb strips, watered with tap water (100ppm) and 8ml cal mag per gallon. fed a bit of gh mild grow blend at half strength twice within last two weeks. started looking like too much nitrogen so i have skipped that last few waterings.

started in a soilless mix by accident, didnt realized, and had ph problems two weeks ago. have repotted and shouldve solved that.

just wanted some second opinions, should i give some mag to the ones that look deficient?

View attachment 4231513
Click to expand...
Just my 2c.
If you had problems 2 weeks ago and then transplanted from soilless to soil the damage may be from that not from the new soil.
No way from your description to be able to tell if your soil needed food yet without knowing details of your soil. If it was in a hot soil like ffof the answer would be no it did not need to be fed.
I would go with water only and see if it progresses.
Read up on the differences between feeding soil synthetic nutes and organic nutes.
Organic nutes feed the soil microbes that then feed the plant.
Synthetic nutes like the one you used does not feed the microbes in the soil it feeds the roots directly.
If you don't get the help you need here post a thread in the plant problem section.
Some of the best problem solvers are in that section and won't see your post here.
Whatever you do or whatever advice you take good luck.
 
CanadianDank

CanadianDank

Well-Known Member
Kushash said:
Just my 2c.
If you had problems 2 weeks ago and then transplanted from soilless to soil the damage may be from that not from the new soil.
No way from your description to be able to tell if your soil needed food yet without knowing details of your soil. If it was in a hot soil like ffof the answer would be no it did not need to be fed.
I would go with water only and see if it progresses.
Read up on the differences between feeding soil synthetic nutes and organic nutes.
Organic nutes feed the soil microbes that then feed the plant.
Synthetic nutes like the one you used does not feed the microbes in the soil it feeds the roots directly.
If you don't get the help you need here post a thread in the plant problem section.
Some of the best problem solvers are in that section and won't see your post here.
Whatever you do or whatever advice you take good luck.
Click to expand...
Hey man thx for the great response. I think i fed too early, the symptoms havent spread over the last 4-5 days and theyre starting to grow at a normal pace again.

Jtrizzy was probably right in his response.
jtrizzy said:
Judging by your tips pointing the ground your N is too high. I don’t think it’s a calmag issue. That’s my opinion.
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I shouldnt have fed anything. i originally thought they were hungry early because they showed signs of N def. But the bag of "potting soil" i bought for their first transplant (didnt have time to run to garden centre) was actually a peat based soilless mix. I wasnt PHing my water and im pretty sure that was all that was wrong. Unfortunately I saw symptoms and fed.

Thanks everyone for the responses, its appreciated.
 
jtrizzy

jtrizzy

Well-Known Member
CanadianDank said:
Hey man thx for the great response. I think i fed too early, the symptoms havent spread over the last 4-5 days and theyre starting to grow at a normal pace again.

Jtrizzy was probably right in his response.



I shouldnt have fed anything. i originally thought they were hungry early because they showed signs of N def. But the bag of "potting soil" i bought for their first transplant (didnt have time to run to garden centre) was actually a peat based soilless mix. I wasnt PHing my water and im pretty sure that was all that was wrong. Unfortunately I saw symptoms and fed.

Thanks everyone for the responses, its appreciated.
Click to expand...

I had the same issue that’s why I knew. My stupid bloom Nutes have 2N and that Plus the soil, plus the calmag it’s just too much N. I need bloom Nutes with just pk only. Happy growing.
 
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