This is the chronicle of my trial with potato towers this year. I am by no means an expert, and there were many things I know I could improve on, so this will hopefully get you started in the right direction for success!
I saw this idea come across Pinterest and was very interested in it. When I was a child, my parents once planted purple potatoes in our small family garden. Without fail, year after year, we would find several “volunteer” plants that came up from potatoes we missed harvesting. It wasn’t necessarily a bad problem to have, but somewhat irritating nonetheless.
I decided to attempt the potato tower to help ease this issue in my garden. Growing potatoes in a specially set aside column of soil would prevent errant potatoes from colonizing. I also like that you can specially designate the soil for the potatoes so it doesn’t strip your other garden soil of nutrients in a particular area. Then you can sprinkle the used soil throughout the garden or keep it saved and just amend it again next year.
Poultry netting (smaller holes are better!)
First, I built the towers out of poultry netting. Cut a strip of netting as big as you want your tower to be. I found mine were a little too big, the potatoes didn’t seem set tubers too far from the edge of the tower, so there was a bit of wasted space. Take the ends of the wire and twist them together to make a secure attachment and turn the netting into a tube.
I included a bottom on my towers as the vole situation in my area is a little outrageous and I knew they would go for the helpless tasty tubers. I wasn’t sure if they would squeeze through the holes, but tried it anyway and didn’t see any evidence of critters.
I recommend a sharp pair of wire cutters and some poke-resistant gloves to help prevent scratches as the netting has a strong tendency to roll up on you.
The soil in the garden I was using is a very heavy clay, which is great for nutrients but horrible for giving potatoes room to grow and breathe. I combined a few different types of soil and amendments, including potting soil and steer manure, to make a nutrient rich soil with good drainage. Most of the bags I used were left over from other projects. I mixed them all in a large wheelbarrow with about 1/3 of the mix being the native clay soil.
Take your time when deciding where to put your potato tower, try to give it as much sun as possible from the most angles possible because the potatoes will be spread around the tower.
When you’ve decided where to put your tower, it’s time to start assembling! Take your straw and put about a loosely packed 2 inch border around the inside edge. Try to use the least amount of straw possible, but enough to keep the soil from falling out of the wire. We want the sun the be able to reach the potatoes!
Cut the seed potatoes to include at least two eyes per piece. I did this a day or two before planting, as many sources recommend. Place the pieces around the potato tower, then cover with about 6 inches of soil and place another layer. I alternated placement so no potato had another one right above it on the next layer. On the top layer of potatoes, put a nice piece in the middle of the tower. Cover the top with about 3-4 inches of soil.
Water the tower well, be sure to get all of the sides where the potatoes have been placed. As the potatoes grow, heap more soil on top to encourage more tubers to grow on the top plants. Keep the tower damp, but not overly wet.
Now the waiting begins! I checked the towers a little compulsively for the first few weeks looking for any sign of growth. They did finally poke through some places along the tower edge!
And everything in my garden turned into a jungle this year. With moving to our new house my garden suffered severe neglect, but the potatoes didn’t seem to mind that much.
Harvest when the plants die back. I harvested by tipping the towers on their sides and rummaging through the soil to expose the potatoes. When it got harder to move the soil, I pushed on the tower with my foot to loosen it. You can also get the bottom potatoes from the bottom of the tower by removing the piece of netting there, mine just fell off so it was easy.
Overall, I was pretty happy with my towers. I hardly looked at mine once they started growing. They got watered maybe three times by me, then only by the mercy of Mother Nature. Unless they get more attention, I wouldn’t recommend Russets for towers. Mine didn’t get as big as I would’ve liked, but hey they could work for you! The red potatoes were plenty usable, so with a little more TLC from me next year it could work even better!
So all in all, were the potato towers more efficient that growing straight in the ground? Maybe. The voles didn’t get to them so I didn’t have any loss. For how many cubic feet of soil I used, the potato yield was probably pretty average or maybe on the low end, but my input as far as care went was bare bones.
Would I try them again? Yes! They had decent yields, so I am happy on that front. I really liked being able to just tip the towers over to harvest versus digging and accidentally slicing through the tubers. I also liked being able to water one tower opposed to a long row. Next year, with more care, I should be able to get the towers perfected!