Hollyhock is a hardy biennial flowering plant that produces fully-double scarlet, pink, white, purple, brown and yellow flowers on sturdy spikes.
It grows up to 5-6 feet tall and blooms from May to October, attracting hummingbirds and butterflies.
It's great for cottage, wildflower, and flower gardens.
The seeds can be planted in August or September and established plants grow in full sun and well-drained soil, tolerating a wide range of soil conditions and some light shade.
Hollyhocks are short-lived but easily self-seed and can persist for years.
- Season: Biennial
Height: 60-72 Inches
Bloom Season: Summer
Environment: Sun/Partial Shade
Soil Type: Rich/Average/Moist well-drained, pH 6.1-7.8
USDA Zones: 3-10
- Sow Indoors: Spring (6-8 weeks before last frost)
Sow Outdoors: Spring/Fall
Seed Depth: 1/8 Inch
Germination Time: 21-28 Days
When to Plant Hollyhock Seeds
Direct Sow approximately one week before the threat of frost has passed. Hollyhocks can also be sown indoors approximately 9 weeks before your final frost and transferred outdoors about 2-3 weeks after the final frost has passed.
Where to Plant Hollyhock Seeds?
Plant hollyhocks, in moist, rich, and well-draining soil that gets full sun exposure - though they can tolerate Partial Shade. One of the significant causes of hollyhock failure is planting in soil that is too dry.
How to Plant Hollyhock Seeds?
Hollyhock seeds require light to germinate, so be careful not to cover them when planting.
Hollyhocks may benefit from a 12 hour soak in warm water, but it is not needed. Direct sow outdoors onto the surface of the soil and compress firmly, but do not cover. Hollyhocks require sunlight to germinate. If starting indoors, use tall, individual pots to transplant, as Hollyhocks have long taproots.
How to Care for Hollyhock?
Hollyhocks are a short-lived perennial, tending to last about 2-3 years. This lifespan can be extended by removing flowers as soon as they fade. In non-tropical climates, you can cut your hollyhocks down and mulch in order to give them longer life as well. Hollyhocks can also be susceptible to rust, which will usually infect lower-growing leaves, but can spread upwards. Prevent rust by watering from below, and promoting good air circulation between your hollyhocks.
Are double hollyhocks perennial?
Do double hollyhocks spread?
Do hollyhocks come back every year?
How many years will hollyhocks bloom?
Where is the best place to plant hollyhocks?
Are hollyhocks poisonous to dogs?
What pairs well with hollyhocks?
How to prevent hollyhocks from diseases?
When planting tall and linear plants, you may encounter the issue of them toppling over.
Use supports: Stick some sturdy poles, wooden stakes, or metal frames around the plants. Insert them into the soil and secure them to the main stems or significant branches for extra support.
Embrace plant grids: Set up or install plant grids around your plants and let the stems intertwine with the grid, adding stability and preventing them from flopping over.
Trim and prune: Keep up with regular pruning to encourage branching and side shoots, enhancing overall structure and stability.
Improve the soil: Ensure your soil is enriched with organic matter, maintaining proper moisture levels and good drainage, which promotes healthy growth and robust root development.
Wind protection: In windy areas, consider using windbreak netting or fences to reduce the impact of strong winds on your plants and shield them.