Is it deer resistant?

Yes

Bastard Indigo is deer resistant.

Amorpha fruticosa

Deer: Rarely
Height: 15 ft (4.6 m)
Spread: 15 ft (4.6 m)
Zones: 4–10
Light: Full sun

Shrub

Bastard Indigo (Amorpha fruticosa)

Photo: AnRo0002 · CC0

Also called False Indigo, Indigo Bush, Indigo Bush Amorpha

More details

Light: Full sun, Partial shade
Water: Low
Type: Shrub
Maintenance: Low
Growth: Fast
Bloom: Spring, Summer
Foliage: Deciduous
Features: Flowering, Native
Best uses: Barrier, Border, Hedge, Mass planting, Meadow, Naturalized, Privacy, Slope