I just dug out 9 cubic yards of diseased garden soil. Verticulum wilt - killed everything good I tried to plant. I couldn't move my garden, so I had to fix it where it was. I have been solarizing the hole for 2 weeks. Soil temp is up to 130 F for 3 or 4 hrs/ day. I think I am ready to lay down landscaping fabric and bring in new soil. Planning on adding soil and then doing raised beds on top of that. The new soil will be about 3 feet deep. One foot in the ground, 2 feet in the raised bed.
Looking for some tips.
1) My garden center has a topsoil mix they can deliver. They have sandy loam with 50% additives (wood, compost, Humus etc). The soil looks good and dark, light and soft and not too much wood. Should I be looking for something else? Should I layer soil types? Should I add anything to the mix? There are so many amendments out there.... Green rock, Kelp, Lava Rock Dust, Gravel from ancient sea beds, good fungus, compost, wormsÃ¢â‚¬Â¦.. Oh my gosh, where to begin.
2) Any suggestions on how to keep the wilt from coming back?