Can too much perlite be a bad thing?

grassy007

Well-Known Member
With regards to soil compaction and nutrient absorption. Using an overly generous amount of perlite, can that negatively impact soil too? Just as much as not using any?
 

StonerCol

Well-Known Member
I'm not sure if too much Perlite is bad for the roots? I have read comments on another forum saying it is not good because it decreases the amount of space the roots have to grow in. Any truth to this or is it BS?
:peace: :bigjoint:
 

Father Ramirez

Well-Known Member
Perlite can cake up, restricting root growth. I've not yet determined why it sometimes cakes, and sometimes doesn't. I use fabric pots, so it's easy to gently massage the root ball to loosen it up without stressing her too much. My current soil grow is 50/50 dirt to perlite, with an aquarium airstone in the bottom to boost oxygen level. Seems to work... growing faster than straight soil, not as fast as hydro. But so much less TLC required! Oxygenated soil could be my new go to method.
 

StonerCol

Well-Known Member
Perlite can cake up, restricting root growth. I've not yet determined why it sometimes cakes, and sometimes doesn't. I use fabric pots, so it's easy to gently massage the root ball to loosen it up without stressing her too much. My current soil grow is 50/50 dirt to perlite, with an aquarium airstone in the bottom to boost oxygen level. Seems to work... growing faster than straight soil, not as fast as hydro. But so much less TLC required! Oxygenated soil could be my new go to method.
Thanks for that dude. I also use fabric pots (root pouch) and they are good. I use Mychorrizal fungi and think that the increased air flow through the soil helps the fungi which in turn helps the roots.......at least that's what I think :)
 

MickFoster

Well-Known Member
The more perlite you use, the more often you will have to water. People who do the original hempy bucket grow in 100% perlite with great results. I grow in coco and use a 50/50 coco/perlite mix. The more oxygen to the roots the faster the growth.
 

vostok

Well-Known Member
With regards to soil compaction and nutrient absorption. Using an overly generous amount of perlite, can that negatively impact soil too? Just as much as not using any?
I always advise 25% perlite minimum,

up to 75% before you get any issues and

that will be as above having to water perhaps 2x day

just where I'm at perlite is as expensive as fuck,

but clean river sand is just as good even pea gravel

good luck
 

Flowki

Well-Known Member
Compared to using 70/30 coco/perlite and watering every day or two, does the yield increase of having to water twice a day in straight perlite justify it?. Just that it seems like quite a commitment to maintain that, unless you all are automating it?.
 
You can grow in 100% perlite and it will work perfectly. Just remember you'll need to add nutrients and such if you go that route as it is an inert matter. I usually to a 50/50 mix of coco coir and perlite as the coir is a great medium to grow in and the perlite gives great aeration!
 

grassy007

Well-Known Member
Too much perlite and I would think the roots have to grow around them particles to suck up nutes. Maybe I added too much. Probably not.
 

Chip Green

Well-Known Member
I tried using straight perlite to no avail, as the medium was physically unable to provide enough support for my plant to remain upright. I guess the roots didn't develop quickly enough for me.
Probably could've grown it laying down I suppose.
 

Nugachino

Well-Known Member
Perlite can cake up, restricting root growth. I've not yet determined why it sometimes cakes, and sometimes doesn't. I use fabric pots, so it's easy to gently massage the root ball to loosen it up without stressing her too much. My current soil grow is 50/50 dirt to perlite, with an aquarium airstone in the bottom to boost oxygen level. Seems to work... growing faster than straight soil, not as fast as hydro. But so much less TLC required! Oxygenated soil could be my new go to method.

That's amusing. I was thinking of trying a SIP with an air stone in the bottom.
 

mr sunshine

Well-Known Member
Perlite can cake up, restricting root growth. I've not yet determined why it sometimes cakes, and sometimes doesn't. I use fabric pots, so it's easy to gently massage the root ball to loosen it up without stressing her too much. My current soil grow is 50/50 dirt to perlite, with an aquarium airstone in the bottom to boost oxygen level. Seems to work... growing faster than straight soil, not as fast as hydro. But so much less TLC required! Oxygenated soil could be my new go to method.
Lots of people grow in nothing but perlite.....
 

deno

Well-Known Member
If you are a new grower, use lots of perlite. The number one reason new growers fail is that they overwater. More perlite gives you more tolerance for error.
 

Daveindiego

Well-Known Member
Here is a plant I harvested today. This is why I’m now adding perlite.

Lots of roots at the bottom of the pot, but they didn’t seem to spread out. Like they went straight to the bottom and curled up.

42FFDDE8-D68A-45F9-B85D-17D6AF7F3137.jpeg 20573732-EA3C-471B-AEE9-D687AFA40ED1.jpeg
 
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