Carpet Rose New Growth Stunted: Possible Rootstock Reversion

Rehabilitated Carpet Roses: Old Canes Normal, New Growth Tiny Flowers

Two neglected carpet roses revived: weeded, deadwood pruned, fertilized, heavy watering in PA heat. Old canes = normal blooms. New growth = stunted, bushy, tiny roses.

Diagnosis: Subsurface Damage or Reversion

• Pre-purchase root damage possible
• If leaves differ: reverting to understock (pull canes to wound, don't cut)
• If not reversion: still remove poor growth—something fundamentally wrong
• Not caused by current care (water/fertilizer/pruning)

Action

Cut out abnormal growth. Monitor for reversion signs (different leaf shape, excessive thorns, single flowers).