Quick answer: 19 native California plants have a recorded bloom range that includes March.
19 species
- Bearberry Arctostaphylos uva-ursi · 16 states
- Blueblossom Ceanothus thyrsiflorus · 1 states
- California bay laurel Umbellularia californica · 3 states
- Checker lily Fritillaria affinis · 3 states
- Coast live oak Quercus agrifolia · 1 states
- Creosote bush Larrea tridentata · 5 states
- Desert globemallow Sphaeralcea ambigua · 2 states
- Desert marigold Baileya multiradiata · 4 states
- Douglas iris Iris douglasiana · 3 states
- Eastern redbud Cercis canadensis · 30 states
- Honey mesquite Prosopis glandulosa · 3 states
- Hummingbird sage Salvia spathacea · 1 states
- Jojoba Simmondsia chinensis · 2 states
- Joshua tree Yucca brevifolia · 3 states
- Pacific madrone Arbutus menziesii · 3 states
- Pacific trillium Trillium ovatum · 3 states
- Silver lupine Lupinus albifrons · 1 states
- Tall Oregon grape Mahonia aquifolium · 3 states
- Valley oak Quercus lobata · 1 states