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Compost in potting soil?

BerndV

Member
Should organic compost be used as an amendment in potting soil mixes? Why or why not? If so, how much? It seems most recipes don't include any type of compost.
 
C

CT Guy

My vote is yes. Not sure what the going rate is among growers on here, but I'd say a minimum 25-30%.

For my potting soil, it's my main ingredient!
 
make sure to cook your mix after adding compost.. Mix it up and let it sit until temps have reduced, or u will burn your plants.

10TT
 

mad librettist

Active member
Veteran
ack! no!

finished compost does not burn plants. If your mix is 35% compost with no blood meal or some other very hot green than go ahead and plant.
 

Lisdexik

Member
It's a must. Especially if your water source is of poor quality.... I make a point to use both compost and eath worm castings at 35-40% in the mix because my water has a high PH and a lot of chlorine.

Lisdexik
 

AcroPhobic

Member
50% homemade compost, 40% Peat-Moss, 10% Perlite and I have the best growing medium I've ever used. Store bought bags are a waste of my $$$ and are puny compared to the endless rubbermaids I fill up when its finished.

I have a 6x6 compost bin and I use finished compost that cures in 62 Liter rubbermaids until Im ready to use it. :tiphat:

Compost has everything a plant needs and then some. I use grass clippings, dry leaves, garden waste,kitchen waste, wood ash, old hay/straw etc etc ..not to mention all that good earthworm poop.
 
J

JackTheGrower

LOL..

Soil is always composting! Just slow or cold composting IF you have life in it.

So you can even start with say a bale of peat moss.. Add some pin shavings.. Green sand... Alfalfa pellets... Azomite.. and whatever is organic like weeds cut from the yard or even grass you have mowed ( just clean the mower well before you gather to avoid oil contamination )

Add what ever.. Get a bale of hay, or alfalfa.. Lots of horse manure and Pile it up! Compost it put it in a pot.. mix with what you like such as bone meal or whatever and Bam super premium soil that keeps on decomposing.

The thing here is no soil should be cut off of being fed.. Top dress with materials that feed the soil food web..
 

NUG-JUG

Member
CT Guy\ML- What do you think of the method of taking your high fungal compost then moistening it, covering it, placing it in a dark spot, and wait for fungal hairs to form. Then taking this and brewing a tea with it? I was just reading a thread about this, but forgot what they said to add besides a high fungal compost. Maybe some alfalfa meal mixed in?:dunno:

Anyway it's supposed to make ridiculously high fungal amounts, and help a lot in flower.
 

dev0n

Member
Compost is the main attraction, without a doubt. In fact, I consider compost to be "the soil" and I'll add a little FFOF, pine bark nuggets (lately), some EWC and perlite/vermiculite for drainage, etc etc. If you're feeding with a compost tea it's the perfect new home for your microherd too!
 

Phedrosbenny

Trying to have a good day
Veteran
I use 50/50 Mushroom compost and Pro Mix to plant clones in.It has been working good so far.I also have top fed plants that seemed to be strugling a bit with compost with good results.Im thinking about adding seaweed powder to the mix.What would be better..directly to the soil..or leaf feed?
 

guest2012y

Living with the soil
Veteran
Just added aprox. 10 gallons of compost to my 3rd round of re-cycled topsoil mix. The transplants (clones) didn't even blink. Straight form clone cab to soil mix.
As mentioned above,it's best to use a finished compost. I'd hate to deal with the cosequences of adding something hot.
 

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