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Thread: DIY rockwool question

  1. #1

    Join Date
    Mar 2019
    Thanked 2 Times in 1 Post

    Default DIY rockwool question

    Hey folks!

    I've been dabbling with growing media and I've found rockwool suits my needs the best. However, there's a problem.

    I'm in India and rockwool cubes are astonishingly expensive here (close to $50 for a 24 pack of 1 inch cubes)

    I've found a workaround and buy the slabs directly and diy the cubes.

    Now, the problem is I don't know what type is required. I have light, medium and heavy bonded.

    Could anyone who uses the cubes for hydroponics let me know which kind is used?

    If it helps, light bond feels dry and crispy, and breaks apart on folding even the slightest. Heavy bond feels like a thick felt sheet and medium bond is closer to a foam.


    Sent from my BKL-L09 using Tapatalk

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    British green (04-03-19), hotshot (17-03-19)

  3. #2

    Join Date
    Mar 2009
    Thanked 150,841 Times in 43,293 Posts


    Good question that I have no idea.... but @British green may know
    "The purpose of our lives is to be happy."
    (Dalai Lama)

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    British green (04-03-19), hotshot (17-03-19), nehan.parhawk (04-03-19)

  5. #3

    Join Date
    Apr 2015
    Thanked 62,144 Times in 14,739 Posts


    As I've always brought rock wool cubes, cut and ready to go into trays this has me a little stumbled but I'd hazard a guess at medium density. You don't want anything that's going to fall apart and break up but you want something to allow air into the roots and ya want ya roots to run freely through the rock wool.
    Sorry I cannot be of more help atm
    I will look into this and get back to you

    in a green and pleasant land

  6. The Following 3 Users Say Thank You to British green For This Useful Post:

    Gaz (20-04-19), hotshot (17-03-19), nehan.parhawk (04-03-19)

  7. #4

    Join Date
    Jan 2019
    Thanked 33 Times in 22 Posts


    light or medium bonded are ok because your plants need oxygen and roots required free movement to grow in a rockwool cube.
    Use coco coir it is easily available in INDIA.

  8. The Following 2 Users Say Thank You to alexphillips For This Useful Post:

    Gaz (20-04-19), hotshot (17-03-19)


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