Diatomaceous earth for seed starting?
I've been reading about using Diatomaceous earth for tomato seed starting on another forum that shall remain unnamed. Many people reported good results, with faster and better germination than they had with traditional seed starting mixes.
But the general consensus was that some DE, including NAPA Auto's Floor Dry #8822, has a pH of 6.0, which is a little too acidic for seed starting. The best results were from using Auto zone's Ultrasorb, which has a pH closer to 6.8. A few years back I used Turface to start broccoli seeds. It worked pretty well. I am wondering if anyone has experience using any of these for starting seeds.
I've been using the NAPA product in my gritty mix (as a substitute for Turface) and in some of my 5-1-1 for veggies in fabric containers (as a substitute for perlite when I want more water retention). I have several bags and am thinking about trying it out for my veggie seeds this year. I'd appreciate hearing what others think of this idea.