Rooting Rose Cuttings: The Jar Method, Potato Myth, and Proven Techniques

Margie wants to root cuttings from her grandmother's funeral roses—heard of jars and potatoes. The jar method risks fungal rot (no airflow). Potato method is folklore—no science supports it.

Proven Method: High Success Rate

1. Cutting: Pencil-thick cane, 6–8 inches, cut just below a node (bud union bump). Keep in damp paper towel in fridge until ready.
2. Prep: Dip base in water, then rooting hormone powder (HydroDynamics Clonex, Garden Safe—available at Lowe's/Home Depot).
3. Medium: Sterile soilless mix (perlite/peat/vermiculite) in clean pot. Pencil-hole, insert cutting, firm gently.
4. Humidity dome: Clear plastic bag or bottle cloche over cutting, propped with sticks. Vent 30 min daily.
5. Conditions: Bright indirect light, 65–75°F. Mist daily. Never tug to check roots—destroys microscopic root hairs.
6. Timeline: 4–6 weeks for roots. New leaves = success.
7. Hardening off: 2 hrs shade outdoors, add 2 hrs daily until full day. Then 2–3 months in pot before garden planting.

Alternative: Layering (Near 100% Success)

Bend a long cane to ground, nick bark 4–6" from tip, dust with hormone, bury 3" deep, weigh down with brick. In 6 months, sever and transplant.

Carlene's Soda Bottle Cloche

Cut bottom off 2L bottle, remove cap, press over outdoor cutting in good soil. Vent cap off. Remove when temps hit 80°F. Simple, effective.

Your grandmother's roses live on—patience and sterile technique make it happen.