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A Homes and Gardens report, drawing on advice from experienced growers, outlines five common mistakes when storing dahlia tubers over winter: leaving large clods of soil, storing tubers before they are dry, using airtight containers, choosing the wrong temperature and neglecting them in storage. The guidance focuses on reducing rot and drying while acknowledging that growers use different packing materials and humidity conditions.
A Homes and Gardens report has outlined five common mistakes that can damage dahlia tubers during winter storage, drawing on advice from experienced gardeners and commercial growers. The recommendations focus on removing excess soil, drying tubers before packing, allowing airflow, keeping them cool and checking them during storage—steps intended to reduce rot, mold and shriveling before spring planting.
The report says gardeners in climates with frost generally need to lift dahlia tubers and store them indoors through winter. It identifies five risks: leaving large clumps of soil attached, putting tubers away while damp, packing them in airtight containers, storing them at unsuitable temperatures and failing to monitor their condition. The supplied material gives detailed recommendations for the first four; it does not provide a specific schedule or method for the fifth.
Growers differ on how clean tubers should be. Lindsey Chastain advises removing loose soil because it can harbor disease organisms and conceal damaged or soft areas. Shelly Deaton, who owns a farm growing nearly 10,000 dahlia plants and more than 400 cultivars, says a thin layer of soil may help protect tubers from drying out. The practical middle ground in the report is to remove large clods without assuming every tuber must be scrubbed or washed.
After washing or rinsing, tubers should dry before storage. Deaton says damp tubers can create condensation and encourage rot. The article recommends leaving them in a dry, cool, well-ventilated place for at least 48 hours and up to a week, then checking that they feel dry and firm. For storage, it favors open crates or ventilated cardboard boxes over sealed containers, with dry wood shavings, vermiculite or coconut coir as packing options cited by the growers.
Keeping Tubers Healthy Until Spring
Storage conditions can affect whether lifted tubers remain viable to plant the following season. Excess moisture and poor airflow are recurring concerns in the growers’ advice: wet tubers or trapped condensation can foster rot, while too little moisture can leave tubers shriveled. A damaged tuber may also affect others stored alongside it, according to Chastain.
The recommendations give gardeners practical checks rather than a guarantee of a larger display of blooms. Keeping tubers firm and in sound condition may support regrowth, but the report does not establish that following these steps will produce more blooms next year. Flowering also depends on conditions beyond winter storage, and the supplied source does not quantify the effect of any one method.
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From Autumn Lifting to Winter Storage
The report describes a seasonal process that begins after the first frosts: cut down the stems and lift tubers from the ground with a garden fork. They then need to be prepared and stored until conditions allow spring planting. The article’s focus is on the period between lifting and replanting, when moisture, temperature and handling can affect tuber condition.
Its sources represent different scales of growing. Chastain offers general gardening and homesteading advice, while Deaton describes practices at a large dahlia farm. Christina Stembel, CEO of Farmgirl Flowers, recommends vermiculite or dry wood shavings for balancing moisture; Deaton says her farm uses coconut coir. These are reported examples, not evidence that one packing material suits every storage space or climate.
“If you have soil on your tubers before you store them, that can harbor disease organisms.”
— Lindsey Chastain, experienced gardener and homesteader
Storage Needs Vary by Setup
The article does not establish a single storage recipe for every home. It reports different approaches to cleaning and packing, and growers’ temperature and humidity figures are examples rather than a controlled comparison. Deaton says her farm stores tubers at about 40–45°F and around 90% relative humidity; Chastain recommends a general range of 40–50°F and a cool, dark location. The best conditions may depend on the storage space and local environment.
The supplied source also does not spell out the fifth mistake in detail, despite the headline’s promise of five. It does not provide a complete monitoring routine, a specific humidity target for home gardeners, or trial results comparing materials. Nor does it confirm that storage advice alone will lead to more blooms the following year.
Check Conditions Through Winter
Once tubers are dry and packed, gardeners can place them in a cool, dark location such as a suitable basement, breezeway or garage, as the report suggests. The supplied text cuts off before completing its advice about location, so it does not give a full checklist for assessing whether any particular space is suitable. Gardeners should use the cited temperature ranges as guidance, not as a guarantee.
The next practical step is to keep an eye on stored tubers and respond if they become soft or show signs of deterioration. The source recommends cutting away tubers that feel soft after drying to help preserve the rest, but gives no detailed winter inspection frequency. In spring, gardeners can assess the tubers’ condition before replanting; the report does not provide a planting date or promise a particular flowering result.
Key Questions
How long should dahlia tubers dry before storage?
The report recommends drying them in a cool, dry, well-ventilated place for at least 48 hours and up to a week. They should feel dry to the touch and firm before packing.
Should all soil be washed off dahlia tubers?
Not necessarily. Chastain advises removing loose soil because it can hide damage or harbor disease, while Deaton says a thin soil layer may help prevent drying. The report’s practical advice is to remove large clods and excess dirt without insisting on a full wash.
What containers and packing materials does the report recommend?
It recommends breathable containers, such as open crates or cardboard boxes with holes, rather than airtight storage. Reported packing choices include dry wood shavings, vermiculite and coconut coir.
What temperature should stored dahlia tubers be kept at?
Chastain gives a general target of 40–50°F, while Deaton says her farm stores tubers at about 40–45°F. These are growers’ recommendations, not a universal guarantee for every storage setup.
Source: homesandgardens.com
