Is it deer resistant?

Yes

Necklace Vine is deer resistant.

Crassula perforata

Deer: Rarely
Height: 2 ft (61 cm)
Spread: 3 ft (91 cm)
Zones: 9–13
Light: Full sun

Houseplant
Perennial
Succulent

Necklace Vine (Crassula perforata)

Photo: Daderot · CC0

Also called Pagoda Plant, Stacked Crassula, String of Buttons

Perennial Crassula

More details

Light: Full sun, Partial shade
Water: Low
Type: Houseplant, Perennial, Succulent
Maintenance: Low
Growth: Fast
Bloom: Spring
Features: Drought tolerant, Flowering
Best uses: Border, Container, Hanging basket, Patio