Is it deer resistant?

Yes

Heliotrope is deer resistant.

Heliotropium arborescens

Deer: Rarely
Height: 12 in (31 cm)
Spread: 12 in (31 cm)
Zones: 10–13
Light: Full sun

Annual
Broadleaf Evergreen
Houseplant
Perennial
Shrub

Heliotrope (Heliotropium arborescens)

Photo: Daderot · CC0

Also called Peruvian Heliotrope

Annual Heliotropium

More details

Light: Full sun, Partial shade
Water: Medium
Type: Annual, Broadleaf evergreen, Houseplant, Perennial
Maintenance: Low
Bloom: Fall, Summer
Foliage: Evergreen
Features: Flowering, Poisonous
Best uses: Container, Houseplant