Field ManualAll plants

Star Roses Standard / Tree Roses

Rosa 'Sunset Horizon'

Family: RosaceaeZones: 5 - 11

Color-Shifting
Tree Standard
Disease Resilient

Pet & Human Safety

People: Not researchedPets: Not on the ASPCA lists as we read them

People: not researched yet.

Toxic to pets

No ASPCA entry found.

Non-toxic to dogs, cats, and horses per ASPCA's Rose entry. Thorns are a mechanical hazard, not a toxicity risk.

PlotAndPetal cannot tell you whether a plant you found can be eaten. Only someone who can see the plant can identify it.

Poison control

If someone has collapsed, cannot be woken, is having a seizure or has trouble breathing, call 911 now. For any other possible poisoning, call Poison Help: 1-800-222-1222.

Emergency number source: U.S. federal law (47 U.S.C. § 251(e)(3)), read 2026-10-07.

Naturalist Lore

Historical Background & Breeding Lore

The history of this plant and its name, and how it was bred, where we have them.

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Care

Hardiness zones: 5 - 11
Mature size: Trunk: about 36 inches of clear stem. Canopy: roughly a 3 ft diameter sphere.
Where it comes from: Modern hybridized selection (Star Roses & Plants): a cultivar, not a wild species with a native range

Soil & Drainage

Pruning & Flush Rhythm

Feeding Schedule

How to prepare the soil, when and what to feed, and how and when to prune where that applies.

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