Just my 2 cents, dump the mix with the cedar into the flower beds and buy some premixed cactus/palm mix and go with it. With many of my plants I do just that, I was using another brand but now use 'Kellog's' in the green striped bag. It seems to drain well which is important, you can always add water or use a saucer. I also give a light sprinkle of mycorrhizae fungi to the roots at planting. Plus, try not to over pot, especially with a recently received bare rooted mango tree. When they first arrive try to find a pot the same size as the root ball, let is grow there for a few weeks to recover, then plant it up a pot size or two.

good luck,
-Ethan

Treat your flowers and dump that soil, I didn't know that about the tannins but I wouldn't take the chance so thanks for sharing your info.

:)

yeah i dont grow flowers so ill have to dump it around some trees.. i dont know if i should risk putting it on top of my raised veggie gardens, not sure i want to consume those tannins..

i just purchased a couple 8oz bags of volcanic pumice