The Setup: Rabbits vs. Tomatoes

My wife and three daughters outnumber me 4-to-1 at home, so I rarely win an argument. But I assumed I could win one against a rabbit. Early June, something started shearing my Better Boy and Roma seedlings off at about four inches. Clean 45-degree cuts. That’s rabbit, not deer.

I did what a tired dad does after fighting Route 3 traffic in Crofton on a Friday evening: I ordered the first thing with five stars and the word “ultrasonic” in the title. $15, solar-powered, “covers up to 5,000 square feet.” My raised bed is 4 x 12 feet, which is 48 square feet. Easy math, I thought.

I staked it in the middle of the bed on a Saturday. Then I mounted a trail cam on a fence post about six feet away, because I trust data more than marketing.

30 Days of Footage and One Very Calm Rabbit

The cam logged 41 rabbit clips over 30 days. In clip 9, a rabbit hops up and sits directly beside the stake, close enough to touch it. It stays 11 seconds. It does not flinch. In clip 23, it washes its face next to the thing. In clip 31, it eats a tomato leaf, which is basically a review.

I’m not saying ultrasonic repellers can never work on anything. I’m saying this one didn’t work on the rabbit that was standing next to it. Meanwhile my plant count dropped from 12 to 7.

So I took it to the garage workbench, next to the 34-degree lager fridge, and opened it with a Phillips #1 and a flathead.

Inside:

  • A speaker about the size of a quarter
  • A coin-sized solar cell, maybe 1 inch across
  • One small rechargeable cell
  • A circuit board with one chip and a motion sensor

That’s it. I’d guess the parts cost under $2. There was no frequency spec, no decibel rating, and nothing on the box proving the output reached the range it claimed. I don’t own an ultrasonic microphone, so I can’t tell you what it was emitting. I can tell you what it did to rabbits, which is nothing.

Cost per rabbit deterred: $15 divided by 0 rabbits. Infinity. My calculator showed “Error” and I felt that.

What Actually Worked: $9 and Ten Minutes

I pulled the stake and went to Home Depot. I bought a 2-inch hex poultry wire roll, 24 inches tall, for about $9, and a bag of zip ties I already had a version of in the junk drawer.

I cut a length around the bed’s perimeter with tin snips, wearing gloves because cut wire ends will find your forearm. I zip-tied it to the existing stakes every 12 inches, buried the bottom 3 inches under soil so nothing could push under it, and folded the top edge outward slightly. Total time: ten minutes. Total tomato loss since then: zero. Trail cam shows a rabbit looking at the fence for 40 seconds, then leaving.

I also measured the fence height three times with my Stanley tape. Neighbor Greg walked over, saw me measuring a rabbit fence, and decided not to ask.

Final math: $15 on the repeller, $0 saved. $9 on wire, 7 plants protected and 5 replacement seedlings planted. The wire wins by roughly infinity.

The repeller goes in the Graveyard. If you’ve got rabbits, skip the gadget aisle. Physical barriers don’t need batteries, firmware, or belief.