It is really hot at the moment, so the fire danger level is high. I am raking up leaves from around the house at a rate of one or two 20 litre buckets a day (and fighting a losing battle). Summer solstice (or Litha) is when gum trees drop a lot of leaves and shed their bark like a Hollywood actress shrugging out of her overcoat to reveal she is naked underneath. All that newborn bark is exceedingly beautiful to look at and I love walking in the bush and letting the cicada song wash over me like a sound ocean, but…extra fuel on the ground leads to extra fire danger.
Common knowledge says that gum leaves are no good for compost; they are allelopathic (don’t play well with other plants), highly acidic, slow to compost and hydrophobic (don’t soak up water). In fact the only thing they have in their favour is we have a lot of them, but what to do with them?. I always struggle with where to put leaves once they are raked up from the constant drifts around the house. I usually rake them away from the house and leave it at that. This year I thought I’d try something different.
The path in my Hugelkultur bed area is constantly sprouting weed seedlings, which I try to keep up with by pulling a handful or two as mulch every time I go in there (not a very effective method) but missing one day means the big weeds are taller and harder to pull out and there are just too many of them. Every year I try to cover the path with cardboard as boxes come into the house, then I cover the path with something; wood chip, sand, mulch hay, etc, anything that will keep the cardboard down and can be shoveled onto the beds the following winter. This year I have decided to try gum leaves and bark.My reasoning is that most people say the leaves will break down eventually, given a year on the ground and it is best to have the allelopathic qualities of the leaves spent on the path where I don’t want plants. Also the leaves will be broken up by the mechanical action of me walking on them often which will speed up their decomposition somewhat. I can add a high nitrogen source like urine to the path to further speed decomposition (pardon the indelicate reference) and dampness provided by the infrequent watering of the garden and rain will also speed the process. When I add the resulting leaf mold to my garden beds I will have to remember to add some lime with it to counteract the acidity of the gum leaf mold. This is an experiment to see if gum leaves can be useful in soil building, I am not sure whether it will work out well or be a failure, but we will see in six months or so.
In other news;
My Hugelkultur beds are growing well. Here are some photos to prove it.
I have continued to build up the beds that were very low on organic matter by adding anything that comes to hand; horse and cow manure collected from beside the road, the contents of the rabbit litter box and any weeds I pull from the garden.
5 thoughts on “Using gum leaves in the garden”
Very good thinking with the gum leaves … and I didn’t know that about those, mind due we don’t have a lot of them round here at all.
Your Hugelkultur beds are looking good too!
Thanks. I love being able to pick food out of it. I thought NZ had a lot of gums?
So did I actually … when I was a kid I remember there being tonnes of them where we lived, but honestly I think I’ve seen maybe 2 in the last 10-15 years. I’m thinking it has something to do with butchering all the native / old trees and replacing them with Pine grr.
Grrr indeed. The same is slowly happening here too. Gum trees are vilified and replaced.
Really? … Not cool at all. I just remember the beautiful smell of them, but I will check it out abit more, but it does seem to be a trend though; swapping them out for the quick and more profitable.