Meyermike made some good points concerning the 5-1-1 mix. However, as he wrote, in the above post "the vitality of our trees depends on how often we push 'oxygen' to the root zone" is not one of them. Roots require some oxygen, but a lot less oxygen then do the aerial parts of the tree. Too much oxygen in the root zone is certainly not beneficial to the tree. The optimal sub straight oxygen level (root zone) is just 6 to 8 ppm. Below 5 ppm the roots begin to suffer, and below 2 ppm roots die. Irrigating your trees with the correct water temperature also helps to maintain the optimal O2 levels. Warm water contains less oxygen then does cool water. 65-F water holds the exact optimal amount of 6- 8 parts oxygen. Warm water (80+-F) holds less then 5 ppm. As with most things in life, humans and plants, over indulgence or under indulgence is not a helpful situation.
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Alliums, lavender, and rosemary
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