We had a bad mess of wind that blew through and did a little damage to the roof on our old barn. It didn’t rip the roofing off entirely but did pull most of the nails out of it. A ladder, impact driver and metal roofing screws had those two pieces re-secured. Many others had nails nearly pulled free.
Mittleider garden sawdust
When it comes to gardening in grow boxes in your Mittleider garden it is extremely important to choose and obtain the correct sawdust. Not just any sawdust will work as your Mittleider garden sawdust.
Most any type of tree will work, with the exception of black walnut. Black walnut has toxins in it called juglone that can stunt, deform or even kill other plants. If the sawmill cuts black walnut you should avoid that sawdust, even if it is free. Do nut use walnut for your Mittleider garden sawdust for any reason.
The only kind of sawmill that you should consider as a good source of sawdust is one that runs a large diameter circular saw blade. The blade kerf is wide enough that you will get the correct size of sawdust particles. See the video at the bottom of this post to see the correct size and an example of a sawdust that is far too fine.
Band saw sawmills
Sawmills that run band saw sawmills are becoming popular and can be found on homesteads where folks make their own lumber. Unfortunately the kerf is much smaller on these types of mills and the sawdust particles are too fine for our purposes and isn’t a good source for our Mittleider garden sawdust.
The size of the sawdust particles is important
Have sawdust that is too large, such as wood chips, will result in poor drainage and souring of your growing medium. This can prevent water from getting to our plant roots and even cut off oxygen. Either can surely kill your plants. (Remember the 6 laws of plant growth?) Planers or even wood chippers would be a common source of wood chips that are too large.
Just as too large can kill your plants, so can sawdust particles which are too fine. This sawdust is would be collected from table saws, band saws, and that cool saw you see in stores like Home Depot and Lowe’s. This sawdust is far too fine and can cause compaction. Once hard and compacted your plants can struggle to get water and nutrients. This fine sawdust is often free, but it can cause real problems in your garden and needs to be avoided.
What if there are no sawmills near me?
If you’re unable to locate sawmills near you and are determined to grow in sand and sawdust then you can buy equine pellets. When the pellets become wet they turn into a usable pine sawdust that works well. It takes just a few minutes to transform the pellets into a usable sawdust.
This old table was originally built with a sheet of plywood and an old pallet I had lying around. The plywood wasn’t treated so it’s getting pretty rough and in need of repair. These treated deck boards should last for years and give a lot more life to this old seedling table. This table is able to hold 4 of those Mittleider seedling flats that I use.
Gardening in sawdust
Is gardening in sawdust possible? Can you grow a garden in sawdust even though it has zero nutrients for the plants? You can with the Mittleider gardening method and it will do amazingly well. Sawdust generally has a nearly ideal pH, it doesn’t have any plant borne diseases like blight in it and can be acquired cheaply or even for FREE as we have done.
You need more than just sawdust
Unfortunately you do need more than just sawdust to grow a beautiful garden. First off, you will need to mix sand in with your sawdust. This will allow for proper drainage.
Because there is no nutritional value to the sawdust and sand it is therefore necessary that we add preplant and weekly feed to our custom soil mix. Due to no nutrients being in sawdust we must add them. As the result of giving the plants all the nutrients they need you will see them thrive.
To learn more about the Mittleider gardening method
To learn more about this amazing gardening method keep reading the blog. You can join the Mittleider Gardening forums and even the facebook group to see others implementing this method or to ask questions. You can get the book as a paperback or digital download from the Grow Food website.
Sawdust for the Mittleider garden
We use sawdust in our Mittleider garden for our grow boxes and in our seedling trays. Each year we top off the grow boxes before the growing season begins. Today we made the trip over to a nearby town where a sawmill allows us to shovel our own sawdust for free. They make pallets and are largely cutting inexpensive cottonwood trees for the lumber. Any tree expect the black walnut provides a usable sawdust for a Mittleider grow box or seedling trays. Make sure you get the correct size particles in your sawdust! If you don’t have sawmills near you then you can use equine pellets.
The sawdust is mixed with sand for both the grow boxes and the seedling trays. For the grow boxes it is mixed at 3 parts sawdust and 1 part sand. For the seedling trays it is 2 parts sawdust to one of the sand. Both are mixed by volume. I’ll try and take some pictures that show the size of the particles. Too large and too fine are both bad.
No idea how much wood they cut in a week, but this sawdust pile is massive, the picture truly doesn’t do it justice.