Rose of Sharon (Hibiscus syriacus) is notoriously late to break dormancy in spring, especially after fall transplanting. In Zone 5–6, it may not leaf out until late May or even early June.
Check for:
Most likely, it's just slow. Hardy hibiscus species are tough—give it time.
Rose of Sharon Winter Care: Not a True Rose, But Still Needs Protection
Mother's Day Hybrid Tea in Pot: Why No Buds Yet (Zone 7b)
Transplanting Mature Rose of Sharon (Hibiscus syriacus)
Identifying "Red Apollo" Rose: Likely a Renamed Variety
Planting Rose of Sharon Near Shallow Buried Utility Line
Propagating Rose of Sharon from Cuttings
Rose of Sharon Split Trunk: Clean, Support, Don't Expect Fusion
Transplanting Ornamental Grass: Late Summer Best, But Summer Works
Rescuing an Over-Pruned Rose of Sharon
Pruning Overgrown Rose of Sharon: Timing, Techniques, and Maintaining a Tree Form
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