plant image thumbnail
plant image thumbnail
plant image thumbnail
plant image thumbnail
Hollyhock

English Name

Althaea Rosea

Scientific Name

Description

Althaea Rosea is the common Hollyhock. There are single and double varieties. Althea is a giant flower garden, its tall spires of large, funnel-shaped flowers providing Summer colour in cottage gardens.

Europe

Origin

Malvaceae

Family

59°F - 70°F

Germination Temperature (°F)

10 days - 12 days

Germination Period

6' - 9'

Height (feet/inches)

Maximum: 2'

Spacing (feet/inches)

Hardy Perennial

Life Cycle

Summer & Autumn

Seasons

None

Fragrance

Colors

Environments

Outdoor, Full Sun & Edging

Germination

Sow seeds in trays of seed compost. Put each seed 1/4 below compost. Place tray in well lit position and keep compost moist.

Propagation

Take cuttings in Autumn or sow seeds in June. Sow annual varieties under glass in February.

Cultivation

Althea Rosea can be grown as a perennial but rust disease soon ruins older plants. It is better to grow it as a biennial or to grow annual varieties the Majorette or the Summer Carnival.

Pruning

Deadhead Althea at the base of the flower spike as soon as they are spent. This discourages seed-making and encourages re-flowering the next season.

Care

Althaea thrives in a sunny, sheltered spot. Stake on exposed sites.

Soil

Any garden soil.



Did you know?

The world's tallest-growing tree is the coast redwood (Sequoia sempervirens), which grows along the Pacific Coast of the United States, mainly in California. Interestingly enough, it's not the world's oldest-growing tree; that award goes to a bristlecone pine (Pinus aristata).