Overview

Romanzoffia californica is a plant with a clump forming habit in the genus Romanzoffia, part of the Boraginaceae family, with deciduous foliage. Romanzoffia californica grows best in full sun, and tolerates loam soils and neutral pH. Its UK hardiness is rated H3. Suggested uses include rock garden, cottage and informal garden and flower borders and beds.

About

Romanzoffia californica is a clump-forming deciduous plant belonging to the Boraginaceae family. It thrives in full sun on a south-facing, sheltered aspect, preferring fertile, moist but well-drained loam soil with a neutral pH. This cultivar is hardy to UK zone H3 and is suitable for rock gardens, cottage and informal gardens, as well as flower borders and beds. It is best cultivated in fertile, well-drained soil and can be propagated by seed or division. Its season of interest spans spring and summer.

Growing conditions

Best soil and position for Romanzoffia

Sunlight
Full sun
Soil type
Loam
Soil pH
Neutral
Soil moisture
Moist but well-drained
Aspect
South-facing
Exposure
Sheltered
UK hardiness
H3

Plant details

Romanzoffia californica size, habit and characteristics

Habit
Clump forming
Foliage
Deciduous
Suggested uses
Rock garden, Cottage and informal garden, Flower borders and beds

Care notes

Pruning and caring for Romanzoffia californica

Propagation
Seed, Division
Pest resistance
Susceptible to aphids, capsid bug, hydrangea scale, vine weevil
Disease resistance
Susceptible to leaf spot, powdery mildews, grey moulds (Botrytis), honey fungus (rarely)

Frequently asked questions

Where is the best place to plant Romanzoffia californica?

Romanzoffia californica prefers full sun. It suits sheltered positions.

What soil does Romanzoffia californica need?

Romanzoffia californica grows best in loam soil. It prefers neutral soil. Aim for soil that stays moist but well-drained.

Is Romanzoffia californica hardy in the UK?

Romanzoffia californica has an RHS hardiness rating of H3, meaning it is half-hardy, tolerating -5 to 1°C, and may need winter protection in colder areas.

How do I propagate Romanzoffia californica?

Seed, Division.