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The perlite is an acidic, glassy volcanic rock containing a certain amount of adherent water and a small amount of crystalline phase, too (feldspar, quartz etc.) By the effect of an abrupt warming up the perlite gets into a pyroplastic state and the pressure of the inner adherent water creates a spatial expansion. The extent of the thermal expansion changes depending on the quality of the raw material, the expansion temperature and time between 1:10 and 1:20. Hungarys only one perlite quarry is to be found in Pálháza. The quarry has been in operation since 1959. The milling, drying and grading of perlite is made in a dressing plant near-by the quarry, according to the demand of the customers. Besides supplying the domestic market the majority of the produced perlite is sold to foreign customers.

I was very satisfied with this mixing with coco...

I hope i could help...

Happy growing!

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Nice info Levente :)

I like adding "Perlite" to my soil mixes to lighten it and add plenty of air holding capacity.

One hydroponic growing method that uses "Perlite" is the "Hempy Bucket" method.

The Hempy Bucket Method

To make a hempy bucket is simple, all you need to do is this:

Get a bucket.

The size of the bucket can vary from 1gal(4lt) to 5gal(20lt).

The preferred size is a 2.5gl bucket, which can yeild up to 14oz depending on the strain and Pheno.

Drill a drain hole in the side of the bucket about 2 inches from the bottom.

The drain hole should be 7/16".

The grow medium is perlite/vermiculite.

3 parts perlite to 1 part vermiculite.

You can use volcanic rocks but the perlite/vermiculite is the preferred method.

Once you have your seedling sprouted fill the bucket with plain water every day until the tap root has reached the standing water that always remains in the bottom of the bucket. this will take about 10-14 days after the bean sprouts, in a 2.5 gl bucket.

Once you see three sets of leaves, water with 1/2 strength nutrient solution. This will be about 14 days after you bean has sprouted.

Completely fill the Hempy Bucket with plain water, every two days.

Use water that has been open overnight to allow the chlorine to escape, unless you can afford to buy filtered or distilled water.. Do not adjust the plain water for ph.

Put 2gls of water in a 2.5gl bucket, and let stand overnight. Add the nutrient solution to this water bucket and then adjust the ph to 6.0 For best results use an accurate ph meter and follow the nutes mfg reccomended amounts very carefully. Use precise measuring devices to make your nute solution.

Fill the Hempy Bucket with 2 gls of nutes you mixed, once a week, unless the plant shows sign of needing more.

Feeding twice a week with 1/2 strenght nutes is a better idea than feeding full strenght nute once a week.

The strenght of your nutes depends on several factors such as how much light you have, humidity, CO2, strain your growing.

One drawback is having to hand water every 2 days, of course you could get an irrigation system set up for your buckets.

The biggest drawback to me, is the runoff.

Got a spare bathroom, grow your Hempy Bucket in the bathtub.

Basements sometimes have drains.

Or you could get a bucket for your bucket and dump that in your bathtub every other day.

Copied and pasted from - https://www.greenpassion.org/index.php?/topic/2718-hempy-bucket-method/

Peace Lams

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Nice to see info on hempy buckets here. I'm trying a couple of grows with the same method you describe above, 3 parts perlite and 1 vermiculite. I'm growing autoflowering plants in a sunny windowsill. I'm impressed so far, the plants look really healthy and seem quite happy. The only problem I seem to be having is the oldest plant is getting too big! Whilst researching about hempy grows I read many people saying that they had gone to hempy after much more complex hydroponic systems and seemed to be getting the same results or better.

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I've got a buddy who uses the Hempy's but his ratios are more like 2 parts perlite to 1 part vermiculite. He uses two liter plastic bottles as his containers,SOG style, and an off the shelf fertilizer called Osmocote Plus that you mix with the perlite/vermiculite mix in a one time application when setting the buckets up. He calls it "Sit and forget growing."

He gets some monster colas from his two liter bottles.

There was an online group called the "Hempy Collective" but I don't know if it's still around? Hempy himself used to post there. It's worth a web search if you're interested in these things.

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