View Full Version : Mycorrhizal fungi - any good for cannabis?
21-09-11, 06:41 PM
Bit of an odd question this, I've got a bag of "Rootgrow" which contains Mycorrhizal fungi.
The theory is that it provides a secondary root system for the plant so it can absorb nutrients better.
It's RHS approved but it states on the packet it doesn't work with brassicas, azeleas, heathers, rhododendrons or cranberries.
What do you think guys?
21-09-11, 10:50 PM
eh up Mr Bimble..
I just laid my hands on some rootgrow after reading about VAM, have to be careful with the water as the chloramine? in the water will wipe it out.. what I did was use bottled water and corrected the PH.
It takes, so they reckon, around 4 weeks to establish a healthy colony, its a reward system between the plant and the fungi plant gives it carbs which in return the fungi gives it nutrients.. win win situation, have read it doesnt do too well in a high percentage peat compost but add a bit of loam or something to the mix and no reason why they cant survive.
I am trialing it with my airpots.. clones are almost ready to go into the 1L airpots, have a feeling the airpot will contribute to the success or downfall of me rootgrow experiment.
Have also had a look into ways of removing chloramine from the tap water and several things came up but no idea how good they would be plant wise, one though is bamboo charcoal filters which I am looking into at the moment.
Important thing is MrB not to wipe your mycorrhizal out before it gets established.. hope this helps, will have more information as I progress through the stages.
tried it once, but didnt leave a control plant.
Didn't seem to make any noticeable difference
THE DUDE ABIDES
22-09-11, 08:29 AM
Hi Mr_B, I tried it this year in my grow when I transplanted to large pots, seemed to slow down the growth but as katy said, I had no 'control' to compare it to.
Forest (formally G Man) also tried it without any noticeable improvement. Have a peek in my diary link below.
Maybe it works best for perrenials rather than annuals, also said on the pack that it takes 4 weeks to start working.
All good things
22-09-11, 10:44 AM
I used it in an RWDC setup for a good while and swear by it!
Innoculate at cutting stage and any subsequent potting up's.
When I first used it, I ran it using a control and the root mass was a little bigger, this was actually AN's Voodoo Juice. A free sample I tried out. I was impressed so bought the RHS stuff, along with Canna Trichaderma. When I was in a regular routine with them both (knowing what I was doing), the roots were huge, almost double the size of what I had been used to seeing. I did some testing in soil and hydro mixing up some plants with Trach, some with Mycy, some with both, some with none and without a doubt, both was better than either, which was better than none but if I had to choose just one it would be mycy.
I vegged plants for 8 weeks however, which I believe was part of the reason I found it beneficial since it gave a good period for its establishment.
Use it carefully and quite sparingly, making sure it is in direct contact with roots. I used it in rockwool & clay pellets but it is better in soil.
It started out as a treatment for trees, it occurs naturally in deciduous forests, and is amongst the largest living organisms on earth.
It could be that it takes a while to spread, and may need an open ground situation to gain full benefit.
I still have some left, I will try it on a couple of next years guerilla grows and see if it works
, which I believe was part of the reason I found it beneficial since it gave a good period for its establishment.
sorry woody, I didn't read that before I posted
25-09-11, 07:31 PM
At least I'm not thinking of doing something stupid,
If it takes a while to establish and doesn't like acidic conditions it would probably be good for a gurilla grow but probably wouldn't get established enough to benifit an indoor Auto grow.
My next grow is going to be a 12/12 from seed so I'll stick some in a couple of the pots and see what happens.
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