Dandaweedman

may as well post the rest of the story...


- The original recipe was a success, but I simply needed to experiment. In addition, sometimes not all ingredients were always available. Therefore, here are some possible additions and/or substitutions. Descriptions to follow

Blood & Bone Meal - when trying to cut costs
Kelp Meal - contains over 62 trace minerals. Good supplement for manure or for reducing the manure content to speed up availability of soil.

Worm castings - excellent source of micro nutrients
Bat guano - excellent for top dressing a week into flowering
Seabird guano
Bugs
On a couple of occasions, I've ended up with fungus gnats with this soil mix. They are more of an irritation than anything but may harm weak or young plants. Some have said that putting a layer of sand on top of the soil in the pots stops the gnats from reproducing. Others can get rid of them by doing a soil drench with diazinon or malathion.

Personally, I prefer to simply introduce fungus gnat predators (Hypoaspis miles). Once established, they not only control fungus gnats, but also thrips and mites. When there is no insect food available, they survive on dead plant material, so remain even after pests are gone to prevent future infestations. Actually, since they have been introduced, I've had no pest problems in over a year and I don't filter my intake. I got mine from Westgro (1-800-663-2552) and they have sales offices in Delta, Victoria, and Kelowna.

Update: they did nothing to prevent a mite infestation in summer of '89 and were destroyed in the mite war. They will be re-introduced after mite war is finally over.

Recycling Soil
Used soil - Reusing soil has a few downsides such as it makes it easier for diseases, viruses, and pathogens from entering your garden. Also peat based soils break down and become acidic. If you fertilize with chemicals you'll end up with salt buildups that will slow growth. Unless you like to take chances, have a good eye, and a good horticultural understanding, you may be better off with staying with fresh new soils. That said;

I grow strictly organic and I've always reused my soil. I don't sterilize the soil between plantings as my soil is full of microbes and predatory bugs that keep the bad bugs under control. After each crop, I chop up the soil and root balls with the leaves, stalks, etc and let compost for about 3 months. I then mix it up and add about 2 - 3 cups of lime for every 50 gallons composted soil. I also add about 1/2 cup epsom salts, 2 liters bone meal, 1 liter blood meal, 1 liter kelp meal, 1 tsp trace elements, and enough perlite to regain the porosity of the original soil. I used to add a bag of manure, but I was getting fertilizer burn and so have stopped now. As I've been fine tuning this, the plants just keep getting healthier and I haven't had any real pest problems for quite a while.

I know this is a controversial approach and maybe even risky, but it allows me to keep my garden pretty much self contained. I don't attract attention by buying bales of soil every 3 - 4 months year around, or in the disposal of leaves and soil after each crop. It's definitely not for those who want sterile crops and those that use pesticides and chemical ferts. I believe in working with nature, not against it.

Update: After several generations, a nutrient imbalance developed which was only solved by leaching the soil thoroughly. My hunch is that one of the micro nutrients was building to toxic levels. I guess farmers don't get this problem because they have the winter rains to leach excess nutrients from their fields.

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