OCD Chilehead said:
What a great read on the RCW. Had to book mark that one again. I think a good blend of compost, RCW, and Bio-Char and one could have some good results. Rick has turned me onto the Bio-Char. I read for about an hour on it last night.
I always like reading what you and Rick have to say. Some great stuff.
Thanks for sharing.
Thanks for reading! That combination would probably work real well, and I think you should try it, but I also urge you to try at least one bed of pure RCW-and-native-earth. It will probably take longer to reach its peak fertility than whatever else you are doing, but after 3 years I promise you that you will be amazed at the results. And forest soil is extremely sustainable and very, very low-maintenance. There is a natural human compulsion to want to continually tweak the soil-building process by adding this mineral and that biologic agent, and by annual tilling, but please bear in mind that nature built forest soil for countless millennia without our help, and it was far richer than anything we have ever designed...
DesertRoots said:
Thanks for sharing those links on RCW. My search for correct material will begin real soon as it seems this is something that does not happen over night. The two links cover it pretty well but are there any tips, dos or donts you can think of from your experiences before beginning?
You mentioned forest soil being a passion so this might be very simple and surface level discussion to you but I found this podcast be a fun listen about fungi and forest soil. Its only 30 or so minutes long but got the wheels turning in my head relating it to gardening and even further with RCW.
http://www.radiolab.org/story/from-tree-to-shining-tree/
Sorry to jump in your glog like this, but its right on topic!
Rob
Thanks for the link Rob! I'll listen to it after work today...
Without going on at great length about my particular process, I should probably say that all my forest soil beds are above ground. I build them at least 18 inches above ground level, by mixing the native earth with hardwood chips, at about a 50/50 ratio. I do that because the native ground at both my garden locations is very high in clay, and the wood chips provide quite a bit of porosity and permeability. The Lemieux studies recommend using far less chips, mixing only to a depth of 2 or 3 inches, but his literature assumes well-draining soil. After the RCW is mixed in and the beds are built up, I finish up by topping with a 3-4 inch thick mulch layer of fresh RCW chips...
The mistake I see most early participants in the forest soil-building process make are:
#1) Tilling. This is an annual ritual that comes down from thousands of years of bad farming and gardening practice. It is absolutely essential that one does not damage the soil food web and the worm population by mechanical cultivation. Set that damn roto-tiller out by the curb!!! Your forest soil beds will be worm palaces, and once the initial mixing of woods chips into the soil is done, the worms will happily take it from there. Please don't reward them by chopping them to bits with a roto-tiller, or even a hand hoe...
#2) Adding anything other than wood chips to the soil mix. This includes fertilizers, manures, fish emulsion, worm tea, seaweed extract, etc., etc. (You get the idea.) The forest knows what it is doing much better than we do, and beyond providing the wood chips, it doesn't need or want our help, thank you very much. There is a tendency to want to "help" the process when the beds are very young by adding other amendments, but I've never had much success with that. Your best friend in building forest soil is patience, and as they say in recovery,
Trust the process!
#3) Planting too early. The RCW needs at least 4 or 5 months to begin decaying before plants are set into the beds. Planting too early won't damage the plants, they just won't grow. I wait at least one year after mixing the wood chips into the soil before I plant.
Having said all that, I have one "cheat" that I use when I need to get plants in the ground right away, and the forest soil beds are very new and raw. Once my RCW-and-native-earth beds are built, I will hollow out a hole for each plant, leaving a couple inches room all around the soil ball formed by the plant container, and "pad" the hole with potting mix, so that the plant's soil ball isn't in direct contact with the raw RCW. This provides enough nutrition for the young plant to get started, while the RCW is still too raw to provide any nutrients. You only want to do this if your beds are very new, and then you will
never need to do it again...