Chipmunks as Farmers

Chipmunks are certainly cute, and they are entertaining—to the right crowd—but they can also be real nuisances digging, chewing holes in garage doors, and swiping low-lying fruit.

Three cats are lined up shoulder-to shoulder, sitting on a doormat, staring very alertly out of a storm door that has a full glass panel.
One of the chipmunk runs is right across the steps outside this door. The cats are transfixed by a chipmunk on the steps, out of our view. Photographed June 24, 2018.

Then there’s the ambivalent in-between state: the cute nuisance. Did you know that chipmunks farm? They regularly cache safflower seeds, which come up like odd little green bouquets in spots along their various runs—in flowerpots, along the north side of the house, and around my garden bench.

About six safflower seedlings peek out from under a geranium leaf.
Chipmunks will plant seeds anywhere they frequent. This venue is a potted hybrid scented geranium. Photographed August 14, 2018.

I imagine them bustling along with their little chipmunk cheeks stuffed full; digging a little hole in a likely looking, out-of-the-way spot; spitting out all those seeds; and burying them neatly. The problem is those seeds sprout! Early last spring there was a row of little green bouquets poking up through the leaves in the ostrich fern bed under my kitchen window. I suspect those had been cached during the winter.

And winter is coming, even though it is 88° as I write this. The waning days of summer are punctuated with crickets singing and industrious hoarding—which the chipmunks seem to have started first. I noticed last week that a mini-mountain seemed to be developing under my new variegated Solomon’s seal. It erupted into the hugest chipmunk cache I have ever seen. The entire extended family must have worked on building it.

A carpet of safflower seedlings underlays my June-planted variegated Solomon’s seal.
The biggest cache ever! These chipmunks were very industrious. There were hundreds of seedlings here. Photographed August 14, 2018.

I dug that mountain out this morning, which meant digging up the variegated Solomon’s seal and putting it aside for replanting.

A heaped pile of safflower seedlings in a very large plant saucer, that is at least two-thirds the width of the upside-down compost bin lid it is resting on. The lid is resting on the bin, which is about 33 inches high by 33 inches wide at its base.
These are most of the safflower seedlings that I dug out of the Solomon’s seal. Photographed August 14, 2018.

There must have been thousands of seeds, some buried too deeply to sprout. I ended up removing two compost-sieves-full of soil containing a mass of unsprouted seeds and broken seedlings that I put in the compost pile, with the broken-off Solomon’s seal leaves on top.

The compost pile with its new additions, which are topped off with the Solomon’s seal leaves.
I added the safflower-contaminated soil to the top of the compost, along with a couple of variegated Solomon’s seal leaves that broke off. Photographed August 14, 2018.

I replaced that soil with some well-aged compost that I mixed into the soil around it, replanted the variegated Solomon’s seal, and dusted the top of the freshly worked soil with about a quarter cup of cayenne pepper.

A top view of the three visible replanted Solomon’s seal, showing the extent of the cayenne pepper dusting.
The edited bed has been replanted and mulched with a dusting of cayenne pepper to discourage the chipmunks. Photographed August 14, 2018.

It looks worse than it is. There is a sturdy, healthy-looking root with no foliage attached that has been replanted too, so I lost only two of the six plants. Solomon’s seal seems to have resilient, sturdy roots. Considering the tumult the chipmunks caused in this little spot, that’s not bad. I am hoping that the cayenne pepper discourages them in this spot, and that the chipmunks will be more discreet in the future. A smaller seed collection would not have attracted that much human attention.