The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Login
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
Login
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
Why don't small closet growers use rockwool b...
FistingNuns
started grow question 5y ago
Why don't small closet growers use rockwool blocks?
Solved
Setup. Substrates
likes
Mr_Weeds_Autos
answered grow question 5y ago
It's more of a choice and experience really because Rockwool blocks are just a soilless substrate or growing medium.
likes
Complain
Selected By The Grower
CRiSPrGrow
answered grow question 5y ago
uhm sure they do, some even do NFT in a 2'x4' it's not a problem , just a choice. My thing with rockwool is that it doesnt work as well as a normal root plug, but it does become necessary when you want to grow sterile. hope this helps ! 🚀
likes
Complain
Similar Grow Questions
Solved
PEAKYPLANTERS
SUBSTRATES
hey grower, greetings to all ... unfortunately I still need your very expensive advice ... they launched me into the world of cultivation with plagrow light mix earth and Atami graduated release pellets as fertilization .... 30 g per pot .... but I see that almost none of you fertilize with these fucking pellets ... .I have pots of 9l and others of 12.5 airpots .... what do you recommend different as fertilization ??? I want to make fucking beasts !!! give it in with the advice
Week 12
Setup. Substrates
6y ago
7
6
Solved
TheFattyMcCoy
New contest? All homemade organics?
Would yall be down for a contest with all homemade inputs??? Would be cool to see what yall can do without all those bottles. Let's get some feedback and see if we can get enough interest to start one.
Setup. Substrates
Feeding. Other
3y ago
9
6
Solved
JSanchezz
Worm Castings, how much ?
3rd grow started yesterday 1x LSD 1x Runtz Muffin Question. I use BioBizz Light Mix and would like to enhance it with worm castings, how much should I mix in? I would have thought that the light mix would be around the young plant and LM + worm casts a lite bitt further around
Setup. Substrates
1y ago
5
6
Solved
Scott13
good evening guys I want some information about flushing and ripen thanks
Other. General questions
Setup. Substrates
4y ago
1
Solved
spankyxvi
How to treat my medium coco peat mix
My growing medium is “Coco peat” come in solid block, then I mixed with 60/20/10/10 Cocopeat/perlite/vermiculite/peat moss My question is should i treat my plant as coco grow instruction or as soil? in term of water and feed. *Im newbie with first grow
Setup. Strain - Autoflowering
Setup. Substrates
3y ago
2
1
Solved
PersasH
Problem measuring EC. Is it my measuring device? Or maybe my measuring method? Im very confused. Help please!!
I ve performed several EC readings in water comming off my pot when I water and they always give very high values: 3.5 to 4.5. People told me it shoudnt be higher than 2.5. I ve tried two different substrates, last one biobizzallmix and very litle to non fertilization. Cause??
Week 7
Setup. Substrates
5y ago
1
4
Solved
dutchwabbit
hydro
Looking to dip my toe into the hydro growing style. Thinking of using rockwool cubes or a perlite vermiculite mix. If i go the per/verm route what would be a good mix?
Setup. Substrates
3y ago
3
Solved
Kirsten
Soil PH of 7.0 too high? How to lower soil PH with dry amendments?
Ok guys, I assume all of us know at least a little about water PH. I need some expert advice. My soil PH is 7.0. I PH my water between 6.0 and 6.5. Which is important? The PH of the Soil, or water? If i need to lower my soil PH, how do i do it? Any dry ammendments that I can add?
Week 10
Setup. Substrates
10mo ago
1
1
Solved
CampaCavallo
Tissue pots
Excuse the ignorance, but in the tissue pots, does the expanded clay still go?
Setup. Substrates
4y ago
4
2
Solved
ThrashedTV_BakedByGlaze
Destiny Dark Matter Super Soil: Yay or Nay?!
First time user of Dark Matter! Someone stocked up on all the Fox Farms left at my local grow shop and I moved up to 2 bags of Destiny Dark Matter Super Soil to get me through these Self Isolation/End of World grows. Let me know the Good, Bad, and Ugly! Stay Safe😷
Week 2
Setup. Substrates
6y ago
19
6
Solved
GreenGuerilla
ANY UK SOIL RECOMMENDATIONS ?
Hi Guys, can anyone recommend a commercial soil mix suitable for transplanting outdoors in the UK? I'm currently using Biobizz indoors but looking for a more readily available option as all the grow shops are currently closed leaving Homebase, Wickes or B&Q as my supply options.
Week 3
Setup. Substrates
6y ago
2
3
Solved
Dankbudz1
G
Has any one used blue skies vienna seed and are they as good as he claims
Setup. Substrates
4y ago
1
1
Solved
Nylanderfour20
Pot shapes and sizes?
Do you think pot shape, not size..produces more uniform plants and do you think pot shape makes a difference in what weight she can bear at the end of flower?
Buds. Other
Plant. Other
Setup. Substrates
4y ago
2
3
Solved
Snailcocktail
Reusing soil
Reusing some old soil? Hello, im about to grow 2 autoflowers in 4 gallon containers and im missing about 1 and a half gallon. Can i reuse some old soil or am i better off buying new soil? Thanks in advance
Setup. Substrates
2y ago
2
4
Solved
Kolibri
Erde ohne Perlite
Gibt es eine gute Erde für den Cannabisanbau, die KEINE Perlite enthält? Canna Terra, Plagron und Biobizz enthalten offenbar in allen Mischungen Perlite, ich möchte dieses aber selbst zuführen. Perlite bekomme ich für 9 Cent das Kilogramm (5-10L)
Setup. Substrates
4y ago
1
5
Solved
GermanGrows
Coco loco ph
Recommended PH for fox farm coco loco mix?
Setup. Substrates
4y ago
1
1
Solved
Lebron
Solo cup grow
There is a solo cup challenge i want to join. Thinking of going with coco. Do i add any nutrients to it at the start? What % of perlite should i add?
Setup. Substrates
3y ago
3
Solved
ItsGrowingOnMe
Will an air stone in reservoir of water under a fabric pot filled with soil contribute anything?
Soil based grow. 3 gallon fabric pot placed in a 5 gallon bucket, with holes drilled out the bottom. The 5 gallon has a reservoir below it. Can I throw an air stone in the reservoir w/ h20 and pump more air to increase oxygen or will the soil not benefit because it’s a hydro grow
Setup. Substrates
4y ago
1
3
Solved
IndigenousOrganics
White mold?
My smart pot is turning white at the bottom. There also appears to be roots trying to pop through. I put rocks between the pot and plate for air. I have one blade of grass and a tiny weed popping up, so conditions at the top of the pot are okay. Should be worried?
Week 3
Roots. Other
Setup. Substrates
6y ago
4
3
Solved
SilverSlapdick
How does this soil mix look?
Running 65% ProMixBX, 25% Castings, and 10% perlite. With 5 tbsp each of crab, feather and fish bone meal as well as 2.5 tbsp each of kelp meal and bat guano. (20 tbsp total for 10 gallons, 2tbsp per gal) Is this too hot for autos?
Setup. Substrates
4y ago
4
3