[UberPooner]

Since rockwool comes with lime dust one it from the factory which is alkaline, it needs to be conditioned. like 4.5ph for 48hrs.

I was wondering if after the rockwool has been conditioned, can it be used weeks/months later?

Or

Would you have to re condition again rite before grow?

[Phaeton]

Rinsed rockwool can be dried and reused but waiting until ready before rinsing breaks up the rockwool less.

A day's watering after the plant is put in rinses the cubes just fine but if worries about the first hours in the rockwool haunt you...
Adding 10 ml of pH up to four gallons of water fixes the initial pH and is used in the garden here.

But rinsing with plain water, poured through without any soak time, has yielded identical plants every time.
My habit of watering new plants every three to five hours keeps the rockwool correct even without prior rinsing.

Old rockwool that has not dried takes on a skunky odor and tends to get mushy if handled a lot. In an emergency I used some year old rockwool that the roots from the last plant were mostly removed.
The new plant grew OK, no special problems.

[different]

Rockwool changed years ago and no longer contains limestone.
It does not need to be “conditioned.”
https://youtu.be/dHKYm_cs4UE

[azad]

^ He's right.

[SoulAnnoyed]

Just use the pink attic shit you dont even have to peel the paper off