Pull beets when the roots reach eating size, and before the ground freezes hard. What you do next matters more than most gardeners expect. Topped beets keep best at 33 to 36 °F, which is warmer than the near-freezing setting that suits carrots and parsnips. Push beets toward 32 °F and the roots are more likely to spot and rot. The same beet crop grown in New Brunswick can last weeks or spoil in days, depending on that one number.
Why colder is not better for beets
The clearest statement comes from the USDA’s Agricultural Handbook 66, The Commercial Storage of Fruits, Vegetables, and Florist and Nursery Stocks, in the chapter written by F. Adamicki. It puts topped beets at 33 to 36 °F (1 to 2 °C) with 98% relative humidity. It also reports that storage at 32 to 34 °F (0 to 1 °C) produces more black spot and rot than storage at slightly higher temperatures.
That runs against a habit most root-crop gardeners have. With carrots, the usual instinct is to get them as close to freezing as the space allows, and the colder spot wins. Beets reverse the rule. A basement corner that would be perfect for carrots can be a little too cold for them.
What temperature should topped beets be stored at?
The number to write down is 33 to 36 °F. It is a narrow window, only three degrees wide, and it sits just above the point where the handbook sees losses climb. The humidity target matters as much as the temperature. At 98%, the air is nearly saturated, which is why roots do best in a damp cellar or in a loosely closed bag or box that holds moisture around them.
The handbook’s wider limit is for pits and cellars: the temperature should not fall below 31 °F (-0.5 °C) or climb above 41 °F (5 °C). Think of that as the outer fence. The 33 to 36 °F range is the target inside it.
How long do bunched beets keep with the leaves on?
Bunched beets, the kind with the greens still attached, can be kept for about 10 to 14 days at 32 °F and above 98% humidity. Treat that as a ceiling reached only when the conditions are right. On a warm kitchen counter or in a dry refrigerator drawer, you will get less.
The practical move is to top them first. Twist or cut the leaves off soon after pulling, then store the roots for the longer haul. The greens can go in the kitchen that week, since they are the part with the shortest shelf life.
None of this makes beets difficult. It means the storage setting that works for the rest of the root cellar needs adjusting for one crop, and a thermometer is the tool that tells you whether it has been.
Where in the house that actually is
No room in a house is set to 33 to 36 °F, so the job is to find the space that drifts closest and then check it. Start by ruling out the extremes. A heated room is far too warm, and roots left in a kitchen or mudroom will soften and shrivel well before the handbook’s windows matter. A refrigerator is built to hold food just above freezing, but its back wall and crisper drawer can run colder than the middle shelves, which is the zone that favors black spot and rot.
Which space in a New Brunswick home comes closest?
An unheated basement or a cellar corner on the north or east wall usually comes closest. Walls below grade hold a steadier temperature than the air above, and winter cold in the province pulls an uninsulated cellar toward the cool end of the range without usually crossing it. An attached garage or an unheated porch is riskier. In a hard cold snap, either can drop below 31 °F, the lower limit the handbook gives for cellars and pits.
Put a thermometer in the spot for a week before you commit the crop, ideally one that records the daily low and high. Read it in the morning, when the space is coldest, and again after the first real cold snap. If it holds between about 31 and 41 °F, the space works. If it hovers near the top of that band, the roots will keep for a shorter time. If it sits at the bottom edge, move the container off the floor and away from the outside wall.
For a refrigerator, do the same test in the drawer you plan to use. If it reads near 32 °F, the roots are better off in a different spot. If it reads in the mid-30s, it can serve for a small batch.
Which beets should you store?
The handbook is plain on this point: large roots keep much better than small ones because they lose water and shrivel more slowly. Set the biggest roots aside for storage and eat the small ones first, because small roots stored for winter will go soft long before the big ones do.
That runs against instinct too. Gardeners tend to save the tender, tidy little beets and use up the oversized ones. For storage, reverse that. Check the container every couple of weeks and use any root that is soft or spotted before it affects its neighbors.
How do you know when beets are ready to pull?
Beets are sown in place, so the days to maturity on a seed packet run from seeding, not from a transplant. In New Brunswick, the timing starts with spring. The average last frost at the Moncton station, from Environment and Climate Change Canada’s climate normals, falls on May 23. That is a midpoint, and in one year out of two the last frost comes later. Northern and upland districts run weeks behind Moncton, so a gardener there should plan the sowing date around the local ground, not the station.
Count forward from the day the seed went in. When the days are up, brush the soil back from the top of a root and check its width. Pull one to test before you lift the row. If the roots are still small, they can stay in the ground a while longer, but not past a hard freeze. Lift them with a garden fork while the soil is still workable.
Why do beets bolt early or turn woody?
These are two separate failures, and each has its own fix. Utah State University Extension notes that water stress during the first 6 weeks can cause premature flowering, which is bolting. Later, heat above 85 °F combined with water stress makes the root woody. The first problem comes from dry spells in the seedling stage, and the second from a hot, dry stretch as the root swells. Steady early moisture addresses the first. Mulch and watering during hot weather address the second.
Does New Brunswick soil suit beets?
Utah State University Extension describes the ideal as deep, sandy, well-drained soil rich in organic matter, with no more than 1 inch of composted organic matter added per 100 sq ft. The province’s most common mapped surface soil is a Podzol, the acid, leached soil that forms under conifers. Its median surface pH is about 4.7, which is strongly acid. The typical texture is loam to silt, with 47 percent sand, 16 percent clay and 37 percent silt, and organic matter near 3.4 percent. Drainage is good.
That description comes from Agriculture and Agri-Food Canada’s soil survey, and it covers the agricultural parts of the province. Your own bed may be nothing like the median, especially along river bottoms, in wet low ground, or where a builder scraped or filled the lot. Use it as a starting point and get a soil test for your own number. The guide to beet soil in New Brunswick covers what the root will meet in the ground, and the notes on what eats beets in New Brunswick, and when cover the problems that show up before harvest.
Common questions
How long do bunched beets last?
About 10 to 14 days at 32 °F and above 98% humidity, with the leaves still on. That is the best case. In a warmer or drier spot they will not last that long, so top them as soon as you can.
Can beets be stored in the refrigerator?
Yes, for a small batch, as long as the drawer is not too cold. Check it with a thermometer. The target for topped beets is 33 to 36 °F, and a drawer near 32 °F is more likely to produce black spot and rot.
Should I store large beets or small ones?
Large ones. They lose water and shrivel more slowly than small roots, so they keep much better. Eat the small ones first.
Is a cold cellar or garage safe for beets?
A cellar or pit is fine between about 31 and 41 °F, with the 33 to 36 °F range as the target inside it. A garage is a gamble, because a hard cold snap can push it below 31 °F. Read a thermometer there before you trust it with the crop.