Is it deer resistant?

Yes

Climbing Aster is deer resistant.

Ampelaster carolinianus

Deer: Rarely
Height: 12 ft 2 in (3.7 m)
Spread: 5 ft 11 in (1.8 m)
Zones: 6–11
Light: Full sun

Ground cover
Perennial
Vine
Wildflower

Climbing Aster (Ampelaster carolinianus)

Photo: Erik · CC0

Ground cover Ampelaster

More details

Light: Full sun, Partial shade
Water: High, Low, Medium
Type: Ground cover, Perennial, Vine, Wildflower
Maintenance: Low
Growth: Fast
Bloom: Fall
Foliage: Deciduous
Features: Flowering, Native
Best uses: Accent, Hedge, Mass planting, Meadow, Naturalized, Path, Patio, Poolside