Seaside daisy

Year-round

Seaside daisy is a low, mounding evergreen perennial with lavender blue daisy flowers, and it stays tidy in a Los Angeles garden with well drained soil and moderate water.

• Give it full sun near the coast and afternoon shade in hotter inland LA neighborhoods.
• Plant in well drained soil, it tolerates clay but can rot in a soggy spot.
• Once established it needs only occasional deep watering, roughly every two to three weeks in summer.
• Deadhead spent flower heads to keep the mound tidy and encourage more blooms.
• Stays under a foot tall, a good low border or edging plant along a walkway.
• ASPCA poison control lists a toxic entry called Seaside Daisy, but that entry is the species Erigeron speciosus, not this one. Because the common names overlap, treat this plant with the same caution around pets that chew on plants.

Its neat, low mounding habit and tidy bloom cycle reads as an intentional flower bed border rather than a wild patch, an easy HOA-friendly pick for a front yard edge.

Fall

Fall's cooling temperatures and returning rain make this a good window to plant, divide, or cut back seaside daisy.

• Plant or transplant now so roots settle in before winter rain arrives.
• Cut back any leggy or woody stems to refresh the mound's shape.
• Watering needs drop off as the first rains typically arrive by mid to late November.
• This is a safe window to divide crowded clumps and replant the divisions.

Winter

Winter rain does most of the watering for seaside daisy in the Los Angeles basin, and the plant stays evergreen through the mild winter.

• Supplemental watering is rarely needed once winter rains set in.
• The plant is evergreen here, expect no dieback in a typical LA winter.
• Frost is rare in the coastal and basin areas but can touch colder inland valleys on clear nights.
• Hold off on major pruning until growth resumes in spring.

Spring

Spring is peak bloom for seaside daisy in the LA basin, and a good time to plant new starts while rain is still falling.

• Expect the heaviest flush of lavender blue blooms from March through May.
• Plant new nursery starts now so roots establish before the dry season.
• Watch new growth for aphids, a light spray of water usually knocks them off.
• Skip fertilizer, this plant does best in lean soil.

Summer

Once established, seaside daisy coasts through the dry Los Angeles summer on infrequent deep watering.

• Water deeply every two to three weeks rather than a light daily sprinkle.
• Mulch around the base to keep roots cool and cut down on watering.
• Deadhead faded flowers to keep the plant blooming into summer.
• In hot inland yards, afternoon shade helps the foliage stay fresh.
• First year plants need more frequent water than established ones.