Grow Mediums Is lava rock ok for the bottom inch on an autopot with no dome?

[Vitteselargesse.]

Have an abundance of lava rocks in both quarter inch and half-3/4 inch that I am hoping to use for my autopot run.

I rinsed them thoroughly and plan on soaking them night before potting. Additionally has anyone used Jacks 321 with an autopot? I have some on hand from my hand water run with bagseed and plan on eventually switching over to mega crop if it ever comes back in stock.

Have learned a bunch from all your threads and appreciate how much information is already out there.


Going to plant Critical Orange Punch auto or Blueberry auto in 2 2.2sized pots in coco/perlite in a 3x3.

Thanks in advance.

 

[Mañ'O'Green]

@Vitteselargesse. Welcome to AFN . I don't have a clue if that would work as I have never even seen an auto pot . Someone that knows about them should happen along soon.

Just a general thought, does anything leach out of the lava rock or are they totally inert? I would soak some in water of known PH and PPM overnight and see if there is a change.

Anyhow .

 

[Vitteselargesse.]

Thank you for the welcome! They are rated for bonsai trees so they shouldn't leech anything. Ill try soaking them overnight tonight. Thanks again!

 

[Nosias]

Welcome.

Most do not use lava rock in the lowest level of the pot. I use 100% coco and currently using Mega Crop 2. I use Advance Nutrients b4.

It is an on going growing of knowledge. Enjoy.

 

[Vitteselargesse.]

Ended up picking up more perlite and will use that for the autopot to limit variables. Thanks for the replies!

 

[St. Tom]

Ended up picking up more perlite and will use that for the autopot to limit variables. Thanks for the replies!

hi, my friend, i buy my coco pre-bagged with a 60/40 clay pebble mix I've never heard of anyone using lava rock and i run mine with no airdromes also as @Nosias says some use just coco I've tried both but the clay pebble mix seems to be were it s at for me anyway and good luck with your grow