Temperature Control for Winter Storage Crops

Courtesy of Wally S., Wally’s Urban Market Garden, Saskatoon SK

More and more consumers go to year round farmers markets so they can know where their food comes from, even in winter. What they find at my stand are storage crops, like beets, carrots and potatoes.

Part of the challenge of year round marketing of produce in cold weather winters is keeping your storage vegetables in good physical condition for several months. Just as in the summer, I take SPIN’s high road by using a cooler. Keeping it at the right storage temperature is key. My cooler is on average around 35 F, or few degrees above freezing celsius. It’s in my garage, along with a work area for prepping produce. I keep it in my garage, which is heated with a small plug in radiant space heater. The thermostat is set to 50 F.

A few nights ago it was -35 Celsius overnight. Just made a celsius to fahrenheit calculation and ironically this is the temperature where the two scales converge: -35 C is the same as -35 F. So I have to deal with the outdoor temperature, the garage temperature and cooler temperature. The heater keeps the garage at 50 F., but the question is how do I keep the cooler at the desired temperature? I find just partially opening the cooler door allows air to seep in from the garage, when it is very cold outside. When temperatures outside get warmer, I can shut off the heater for certain periods of time and close the door for the cooler. Right now the cooler temperature is 34 F, which is about optimal. The aim is to keep it above freezing, and below 40 F.

SF photo Wally temp2

 

This is not a high tech method for sure, but it works, as long as I keep an eye on things happening inside and outside. So you don’t need an elaborate setup to keep your farm stand stocked with the staples that keep your customers coming, and your cash flowing,  when the snow is flying.