How to Store Flower Tubers for a Thriving Next Season
Spring Awakening: How to Revive Dahlias, Begonias, and Cannas Before Planting
As dahlia, begonia, and canna tubers begin to stir from dormancy ahead of garden planting, some may need saving from drought stress or rot. Russia's Rosselkhozzentr (Federal Agricultural Center) shares expert advice on how to revive them.
Visual Inspection
Dahlias: Look for firm, intact tubers with live buds—small sprouts should be visible. Begonias: Tubers should be plump, free of spots or mold. Their buds usually appear as tiny bumps in the center. Cannas: Choose sturdy tubers with no signs of rot. Their buds form closer to the ends.
Tactile Check
A healthy tuber should feel solid—not mushy, spongy, or excessively dry and shriveled.
Reviving Dehydrated Tubers - Light misting: Gently spray tubers with water from a spray bottle. - Moist substrate: Place them in containers, lightly covered with damp peat, sawdust, or moss. The medium should be slightly moist, not soggy. - Storage conditions: Return tubers to a cool (+5…+10°C / 41…50°F) and humid environment (place a water tray nearby). Check regularly to prevent re-drying or rot. - Soaking (for severe cases): Submerge tubers in warm water or a weak growth stimulant solution for 30–60 minutes.
Dealing with Rot or Mold
- Prune carefully: Use a sterilized knife to trim away all affected areas down to healthy tissue.
- Treat cuts: Disinfect with brilliant green (zelenka), activated charcoal, or a fungicide (follow product instructions).
- Air-dry: Let tubers dry for several hours post-treatment.
- Isolate if needed: Severely damaged tubers are best potted separately in fresh, loose soil to avoid contaminating others.
Preventing Future Issues
- Optimal storage: Maintain steady temperatures (+5…+10°C / 41…50°F) and humidity (70–80%), avoiding fluctuations.
- Good airflow: Avoid overcrowding tubers.
- Pre-storage prep: Treat with fungicide and dry thoroughly before storing.
