Wicking Box Gardens
Wicking Box Gardens
I had to plant some of these rapidly growing brassicas so I decided on a few wicking boxes.The concept of these is the same as the in ground Wicking Beds.
You need a container without drainage holes, it's sides need to be at least 30cm tall.
Here in Aust broccoli is packed in polystyrene boxes that are just about right for this.
They are 600 mm x 300mm in size and will need a hole made in the side about 100mm high for drainage. Experiment with the height of this hole.
If you only have boxes with holes in them use these but line the base with plastic. Only the bottom 100mm needs to be covered as it's only to this height that will need to hold water.
For these I'm using up some hose that is sold for distributing grey water from washing machines.We're not using this in our grey water set up so it's been sitting in the shed. It's a 22 mm hose and has holes the length of it.
I had some of the larger drainage pipe left-over from making the in-ground beds so I tried some with this too.


The ends of the small hose were blocked with some of Doc's leftover dowel bits. The larger hose was able to be wedged against the edge of the box.
The covered pipe was surrounded with chopped pea straw and shredded paper to hold the water. This was covered with a thin layer of chook house bedding a mixture of wood shavings shredded paper and chook poop.
I used Max Mixer to make up a mixture of potting mix, compost, blood and bone, coir soaked in Seaweed extract, Charlie carp, Epsom salts and potash.
An important part of this system is to add some worm bedding including some of the compost worms.
A tube of 50cm drain pipe was cut and had 15 mm holes drilled into the sides of it. This is where the worm food will be put and the worms will enter it to eat.
This saves having unbroken down food scraps in the box. The scraps are blended up and put into the tube of which about 1/3 is buried.
These boxes have been planted up with Mini Cauliflower, Broccoli, Lebanese Cress, Parsley, Kale, some companions Egyptian Onions, Thyme; later some Celpar and Coriander may be added if there is room.
Updates:
Wicking Boxes and The Heat



















17 comments:
Really fascinating! Can I ask an obvious question? Do you pour water down the pipe holes? Is it supposed to be a water reservoir at the bottom of the box?
Hi Matron
The water is poured into the drainage hose at the top to feed it through to the bottom layer which does act as a reservoir. The rest of the soil in the box is watered by the 'wicking' action whereby water is pulled up to the growing layer. The compost worms live in the growing layers to keep the soil healthy.
From the Waterright site (link below)
"The wicking bed is the most important, it enables us to grow food with a lot less water, it can be used to harvest water otherwise lost and particularly it can actually capture carbon from the atmosphere."
Click here to visit the waterright site with lots more info.
That looks really interesting! I hope you post some progress shots so we can see how it turns out. Will you get more than one brassica plant to a box or would that be too crowded? Melissa
Hello Melissa
I intend to take progress shots (even if it fails..eek).
It would depend on the type of brassica chosen. I could have put 2 of the mini cauliflowers in I think. Perhaps some of the more compact varieties that are more suited to containers could be used. I wasn't actually planning to use these boxes when I planted the seeds, so they weren't chosen to grow in containers.
Asia varieties like pak choi or bok choy and others that can be planted closer together should work too.
I wanted to make these with a mixture of plants in them, mainly to see what works best in these boxes.
I'm still experimenting with these systems so there's still lots to learn.
I tried the wicking bed idea in a terracotta strawberry pot because they always seem hard to water and it has worked well so far.
That sounds like a good idea Tracy!
Let me know how it goes.
Wow... It really is an art isn't it??? You're doing a fantastic job, thanks for the advice!
Jodie
What a brilliant idea. I use fish boxes for starting off early plants. I am so looking forward to our summer.
You site is such a mine of information which never fails to impress me.
Hi Jodie
It's fascinating really, I'm still experimenting but it's seems to be working so far.
Hello Lottie
Spring must be just around the corner for you...you've had quite a winter.
Your allotment's looking really great and just about ready for planting.
Scarecrow, I have a question - Are you saying that you have compost worms INSIDE the box with the plants growing?
I am raising worms in a worm bin, but after reading Charles Darwin's book about earthworms, I was wondering if i could put them in the TONS of houseplants I have. People always say that my home looks like a greenhouse! :) It would be so handy to be able to raise them there! But I hadn't heard if anyone had done that before or not. Thanks for your help!
MY apologies for asking, but I've been reading about polystyrene leaching, do you have no concern over it leaching into your food? I have so many styrofoam boxes it's ridiculous, but I'm thinking I need to put a plastic bag liner in them.
furthermore, what do you use for the bottom layer? or is it just good loamy soil from bottom to top?
Hi Anonymous??
No need to apologise, it's a valid question. Apparently there is more leaching as the boxes age. I'm happy to use them though.
By all means line them with plastic (if that doesn't leach too??) if you wish. Just remember to put the drainage hole in about 10cms up from the bottom and make sure the water will drain out of that hole and not to the inside of the box.
Folks have also used plastic containers (storage/recycling type) to make these gardens too but I think they would get too hot in our climate.
I've also used old washing machine tubs for these, anything that's big enough and looks like it will work.
These early boxes had straw and paper in that base layer but as it broke down this mixture became very smelly. I now use sand or a very sandy loam. You might try gravel as other folks have had success with that.
Any compostable material will breakdown and apart from the smell will cause the soil level in the box to drop. Plus the worms might eat it!
Hey,
I'm about to go out and try to find what I can to start making a couple of these boxes. My only question is how do you stop the soil from getting into the reservoir area?
Thanks
Benen
Hi Benen
I'll have to update this post as I now use sand in the reservoir layer. This doesn't break down and seems to work as well in these boxes as it does in the in-ground beads.
I haven't had any problems with it being mixed in with the soil and don't think it would be that much of a problem anyway. The roots of the plants can't survive in that layer due to the presence of water on a regular basis.
The wicking action still works. A fairly sandy loam works well too.
Well I made my box last night, its a fairly deep plastic recycling container, about 80x80x80cm. I ended up using some very sandy loam from the back yard, a grey water pipe with an old t-shirt over the top of it to stop the sand getting into the holes. I've then filled the rest up with a mixture of moopoo which is full of hummus and a good potting mix. I'm yet to place a compost layer and mulch layer. It held about 15 litres of water before it ran out of the holes at the bottom. No water has soaked up to the surface area yet though or will this not happen until there are plants in it?
I also planted some carrot, broccoli and beet seeds to get some seedlings going to try in there once they're big enough.
Thanks heaps,
Benen
Hi Benen
Great job on the box! The actual surface is supposed to stay dry. If you dig down a few cms you should find some moist soil mix. This is why I prefer to plant seedlings in these systems. The roots will be down in that zone straight away.
Other folks plant seeds in the systems with success so I guess they do work too.
Have you got any compost worms to put in as well?
They help to mix everything up and keep the soil mix aerated. It may work without worms but I haven't tried that yet.
This link is to a thread on the ALS forum where other folks are recording their experiences with wicking beds. You might pick up some hints on there too!
thanks so much, I've not managed to get my hands on any worms yet but it is definitely on the list. I'll let you know how i go.
Cheers
Benen
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