Karl Trepka wrote:Hi
i have a similar issue at my parents place where they water and water and the trees are not looking very happy.
because they're not permaculture minded and only tolerate token mulching i have been trialing the following.
with a hand auger (post hole digger) dig about 4 holes as deep as you can around the drip line. with mine the handle is about 800mm-1m.
now fill all these holes with 100% semi rotted wood chips. if you only have fresh wood chips just avoid allopathic stuff where possible.
mix in a generous scoop of blood and bone or other slow release fertilizer as you fill each hole with wood chips.
when watering fill each hole just until overflowing. my 8 inch dia auger at 1m has a hole volume of 60L so with chips i guestimate about 30L
you could even use all your other methods on top of this just make sure you water in these holes as all the microbes and worms spread underground from these holes.
i call it vertical swales or stealth swales.
Marco Banks wrote:Heavy mulch for several years will dramatically help your soil. Worms and other biota will decompact the soil for you, but you'll need to crate a habitat for them to thrive in. A foot or so of wood-chip mulch, spread widely from the trunk outward (at least to the drip line) will hold moisture, cut down on soil irradiation by the sun, provide habitat for worms, promote fungal growth, and provide a source for soil carbon accumulation.
Mulch, mulch, mulch, mulch, mulch.
And then wait.
Also, stay off it when it's wet.
Karl Trepka wrote:Hi Rose,
how much to water is very dependant on species, size of tree and weather you want survival or rapid growth........and the time of year.
at the very least dig down a bit once a week to see if still moist.........if you want growth i would aim for 50 liters per week per square meter of dripline area in the summer.....if the tree is huge the amount of water could be large so just go with what you can.
also micro swales could be used like feeder channels to fill the holes when it rains.......use a bit of slope......not on contour.
the problem with sawdust in a deep hole could be things getting anaerobic (no air) wood chips are nice and chunky and let air down the hole.......lets say no more than 10% mixed with chips
a smaller auger may be easier to use just use more number of holes.