Giving cal-mag to seedlings ?

Anyone out there give cal-mag to their couple day old seedlings ? if not when do you start ?
I read one is to start right away ,

Nothing for seedling till the third node
The only exception would be trying to start them in COCO which I have never tried

morugawelder said:

Anyone out there give cal-mag to their couple day old seedlings ? if not when do you start ?
I read one is to start right away ,

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I soak my seedlings rockwool cubes in cal-mag with no issues at all

budman111 said:

I soak my seedlings rockwool cubes in cal-mag with no issues at all

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Why ?
Issues? what is the upside?

there is no need for calmag in the seedling stage

If your using RO add. Tap in buffered Coco your good for now.

Herb & Suds said:

Why ?
Issues? what is the upside?

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I grow Under LED and it gets in the plants system from the go and I have very soft water and flowering gets rusty spots without it.

but what about cal - mag at early stages ?

well i add lime to my soil so i usually dont have to supplement till flower
ive never had a plant be def in cal/mag till well ino veg

most calmag has nitrogen along with it. I use RO water, and dont worry about calmag on a seedling for quite a while. But if you did add it, I would let the amount of nitrogen you're possibly adding be your guide.

elephantSea said:

most calmag has nitrogen along with it. I use RO water, and dont worry about calmag on a seedling for quite a while. But if you did add it, I would let the amount of nitrogen you're possibly adding be your guide.

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no I haven't added any , but read about it somewhere

My CalMag has Nitrogen in it and I accidentally picked up the wrong container of Ph-ed water I was using one day and managed to fry some new seedlings that had just got their first set of actual leaves. I try not to add anything except Ph down to my well water until my plants are on their third set of leaves. I use Happy Frog soil which I add worm casting to, I get big bags of worm castings cheap ($3.00 for a 30 pound bag) from a commercial worm bait business down the road from my house.

I've grown from seed to harvest with water right from my well with few problems with a Ph close to 7 but now add 1ml of Ph Down per gallon which gives me a Ph of 6. But I don't always even lower the Ph every time I water without nutes. If I am adding CalMag or Fox Farms trio I check my Ph. But I add nothing to the water until my plants are well established as the Fox Farms soil and worm castings is all they need for the first 3 or 4 weeks.

Seedlings?
Or cuttings?
Seedlings have colyton leaves. The very first ones you see. Theyre round. Those have a purpose, which is to supply the seedling with nutrients. They have everything the seedling needs, regardless of whether or not you use RO water. Once they turn brown they have been sucked dry and it is time to start feeding the seedlngs nutes.

Cuttings... theyre mature and need food right after they root up.

Gquebed said:

Seedlings?
Or cuttings?
Seedlings have colyton leaves. The very first ones you see. Theyre round. Those have a purpose, which is to supply the seedling with nutrients. They have everything the seedling needs, regardless of whether or not you use RO water. Once they turn brown they have been sucked dry and it is time to start feeding the seedlngs nutes.

Cuttings... theyre mature and need food right after they root up.

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Depending on your medium. If you're using coco or rockwool, yes. If you're using amended soil or potting soil (organic or not) there's going to be nutrients in it already, and you shouldn't need to feed it for a while.

CanadianJim said:

Depending on your medium. If you're using coco or rockwool, yes. If you're using amended soil or potting soil (organic or not) there's going to be nutrients in it already, and you shouldn't need to feed it for a while.

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True, but the OP said promix, which is inert.

Gquebed said:

True, but the OP said promix, which is inert.

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I just re-read the thread and he doesn't mention what his medium is. And there are several different kinds of promix, a couple of which are inert, but the flowering plant potting soil is heavy on the nutrients (possibly enough to burn weed), and the herb & vegetable potting mix which I use has enough nutrients to feed an indica for more than a month (there seems to be enough nitrogen in it for sativas to react badly).

I start using Cal-Mag in the first week as I have had cal-mag def as early as 2 weeks as my water source has basically zero cal or mag

I grow hempy style in perlite/vermiculite and wil start with a small amount of cal-mag in the first week then increase as it progresses.

Once established, I use 1 mg of Cal-Mag per litre of water/feed (4 mg per US gallon / 4 litres)

CanadianJim said:

I just re-read the thread and he doesn't mention what his medium is. And there are several different kinds of promix, a couple of which are inert, but the flowering plant potting soil is heavy on the nutrients (possibly enough to burn weed), and the herb & vegetable potting mix which I use has enough nutrients to feed an indica for more than a month (there seems to be enough nitrogen in it for sativas to react badly).

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Oops.... i musta confused another thread.
I was prolly high too...lol