Growing with rockwool. What are the tips and tricks you veterans have picked up

Discussion in 'Drain-To-Waste Hydro' started by SuperHI TnT, Jul 11, 2018.

  1.  
    SuperHI TnT

    SuperHI TnT Well-Known Member

    ive been growing for a year and 3/4 of that has been strictly done with rockwool. I use floraflex for feeding and floranova/bloom nutes. The last few crops have been excellent but I’ve been doing a bit of research and realized how little I know about this substrate and how to produce the biggest yields with it. Any little tips or tricks or general advice would be great. Feel free to ask questions because I’d like to get a dialog going with other rockwool drain to waste growers.
     
    coreywebster and rkymtnman like this.
  2.  
    rkymtnman

    rkymtnman Well-Known Member

  3.  
    JohnDee

    JohnDee Well-Known Member

    Hi SuperHi,
    Like you...I've been doing rockwool research. I've always cloned in 1 1/2" cubes and am now looking to do veg in 4"x4" and then onto hydroton.

    What sort of rockwool grow do you have going?
    JD
     
    SuperHI TnT likes this.
  4.  
    ANC

    ANC Well-Known Member

    I didn't come up with this method... but basically use a long tray that is positioned at an angle. Line the bottom with polyester batting and place your blocks on that. Cover it all with panda film, so no light can reach the batting. Water is fed in at the high side through a wide T inlet and drains back into the reservoir on the other end. My pump runs about every 6 hours. This way you can grow a giant root system with a 4" cube.
     
    coreywebster likes this.
  5.  
    coreywebster

    coreywebster Well-Known Member

    like NFT?
     
    ANC likes this.
  6.  
    ANC

    ANC Well-Known Member

    Yep, you have the batting with the blocks on and then cover the trays with plastic the keep water in and light out. Flood it from one end, drain it on the other with gravity.
     
    Airwalker16 and coreywebster like this.
  7.  
    coreywebster

    coreywebster Well-Known Member

    How have you been using it so far?
    What system?

     
  8.  
    Airwalker16

    Airwalker16 Well-Known Member

    I'd at least upgrade to FloraTrio.
     
  9.  
    SuperHI TnT

    SuperHI TnT Well-Known Member

    At first I had bad luck at best because I was letting the blocks and slabs sit in stagnant drainage water. Once I figured out that the medium needs to drain it’s been smooth sailing. The funny thing is nobody on this forum thought of that. Now I use 6” hugo blocks in 6” by 36” grodan Dutch leach trays. Sometimes I add a 3” slab and sometimes I don’t if the plants seem tall early on. The last bud I grew was blue dream and gorilla glue #4 and got a pound of dry bud off of 6 plants. I use the floraflex caps which is how I’ve been able to somewhat automate it. I use 4 CLUO-48 1818 90 cri LED’s at around 90w apiece. My tent is 32” by 48” by 48” and I have another that’s the exact same size. Each sits on one side of my closet.
     
    Jimdamick likes this.
  10.  
    JohnDee

    JohnDee Well-Known Member

    More accurately: Of the miniscule number of people that visited your thread...nobody decided to comment.

    How are those working out? Using two feed hoses or just one? I'm gong to try the 4" ones out next grow.

    I'd like to understand this point better. If you have tall plants that won't need much veg...then you don't use the slab? Or what...please explain.
    JD
     
  11.  
    JohnDee

    JohnDee Well-Known Member

    I just wanted to clarify the floraflex caps...

    They are a molded plastic product designed to fit on top of rockwool cubes. I know they make them in 4" and 6" cubes

    They do two things...
    Provide an attach point for a top drip hose connection.
    They cover and protect the cubes...to minimize algae

    They are perfect solution to several rockwool problems.
    JD
     
    SuperHI TnT likes this.
  12.  
    SuperHI TnT

    SuperHI TnT Well-Known Member

    I’ll clarify...my last grow the plants were shorter so I had plenty of head room so I added the 3” slabs into the Dutch leach tray. That particular batch took a bit longer to ripen and the next batch vegged a little to long and got taller so rather than risk running out of room I opted not to use the slabs. The first run I did with this system I didn’t use a slab and got great results but not quite as good a yield
     
  13.  
    SuperHI TnT

    SuperHI TnT Well-Known Member

    I have used the 4” and 6” 2.0 caps and I also use the drip shield caps for flowering. It really is a great system. I opted to go without pvc and used hose and air pump manifolds that have the adjustable valves with a regular water pump. I can finely tune flow just like with their system at a fraction of the cost
     
  14.  
    SuperHI TnT

    SuperHI TnT Well-Known Member

    I use just one feed hose for the couple I’m growing that don’t have the drip shields. Two would be better but it’s a temporary situation
     
  15.  
    SuperHI TnT

    SuperHI TnT Well-Known Member

    Honestly I’m looking to replace my caps with the new 6” matrix systems floraflex just came out with. I like how it wicks the water into the rockwool. To me it looks like their new and improved version of the floracap
     
  16.  
    JohnDee

    JohnDee Well-Known Member

    Thanks SeperHI,
    Indeed, that explains it perfectly...a headroom issue.

    And on a thread on rockwool...we will have to talk about pre-flush...Pre-soak with rockwool. I've always used 1/4 strength nutrients (Maxi-Bloom) with just a bit of epsom salts.
    JD
     
    Jimdamick and SuperHI TnT like this.
  17.  
    JohnDee

    JohnDee Well-Known Member

    I will look into that...thanks
    JD
     
  18.  
    SuperHI TnT

    SuperHI TnT Well-Known Member

    Wierd that you mentioned maxibloom because I ordered it and the maxigro to do a side my side comparison with floranova
     
  19.  
    JohnDee

    JohnDee Well-Known Member

    I switched over to Mxobloom when I realized that it does the Lucas formula so nicely. So no Maxi-grow...ever.
    JD
     
  20.  
    SuperHI TnT

    SuperHI TnT Well-Known Member

    What do you mean? Should I not use maxigro?
     

Share This Page