|
New questions:
For our larger growers please see also FAQ on the main Grodan web site: Frequently asked questions. Question 1 What is Hydroponics? Question 2 What is Grodan Stonewool? Question 3 What are the benefits of hydroponic growing? Question 4 I ordered two hydroponics kits; both of them came with gro rocks. I was curious to know if I could use the Mini Grodan® Growcubes® instead of the gro rocks? I'm afraid since they would be constantly wet without drain that the roots would not survive. View answer Question 5 How do I prepare the Hydrokorrels for use with my hydroponic plants? I need to know if I should remove the seedling from the starter cube before placing it in the cup with the Hydrokorrels around it. Lastly, how low should I keep the light unit from the seeds (plants)? View answer Question 6 The leaves on my plants curl downwards…. why and how do I fix it? View answer Question 7 I just started using mini Grodan Growcubes and the pH is dropping rapidly. What am I doing wrong? (The plant is flowering.) View answer Question 8 I have a really bad algae (slimy green stuff on the surface) problem using Rockwool. Is there anything that you can suggest to stop this problem from occurring? View answer Question 9 In an ebb & flow system, why should Grodan blocks be top irrigated (flushed) once a week? View answer Question 10 How dry should Grodan blocks be before they are flooded again in an ebb & flow system? View answer Question 11 Is Grodan alkaline? And how do you adjust the pH? View answer Question 12 I have read that it's important to soak these cubes in water adjusted to a PH of 5.0. Thus conditioning them prior to planting. Is this information correct and if so just how do the commercial growers soak a 1,000 or so at a time? View answer Question 13 What should be the feeding cycle for plants growing in pots with 50/50 loose rockwool (50% Absorbent and 50% Repellent Agro Dynamics Granulated Rockwool)? View answer Question14 How do I condition Grodan Growcubes in large bags for pH? View answer Question15 What is the purpose of the plastic covering on Grodan? View answer Question 16 Is stonewool safe? It feels like fiberglass? View answer Question 17 Can I use a 6” block (Hugo) in an ebb & flood system? View answer Question 18 How many gallons per hour flow do I need in a constant flow system using Growcubes, if I have shelves feeding the plants on shelves below them? View answer Question 19 Is it a good idea to use emitters to help regulate flow to my plants? View answer Question 20 What are the general feeding & watering guidelines for nft systems? View answer Question 21 What causes mold on the Grodan or root rot in my plants? View answer Question 22 Why does the pH of the nutrient solution in the block increase? View answer Question 23 Why do I get mushy or hard spots in the block? View answer Question 24 Should I be worried about rockwool dust? View answer Question 25 Where do I cut drain hole slits on the slab? View answer Question 26 What about salt crust formation on the top of the block? View answer Question 27 Can I recycle Grodan®? View answer Question 28 Will airstones at the bottom of a flooded container work with Growcubes? View answer Question 29 Do you have to germinate seeds before planting them in a hydroponic system? View answer Question 30 I've run out of my regular plant food and can't get any more for a few days, what should I do? View answer Question 31 What to use instead of GreenMix and how to condition granulate. View answer Question 32 How do I transplant from rockwool into coco coir? View answer Question 33 Why does the Grodan Stater tray not come with 98 cells to suit the sheet of plugs ? What about inserts for your other plugs 50/sheet and 200/sheet ? View answer |