25 Double Red Hollyhock Seeds Perennial Flowers Seed Flower 323
Full to part sun
Bloom Period and Seasonal Color
Hollyhocks bloom from mid to late summer
Mature Height x Spread
4 to 9 feet tall and 2 to 3 feet wide. There are dwarf selections as well.
Hollyhocks are classic English cottage garden plants that are favorites of many flower border gardeners. The tall, stately flower stalks yield hibiscus-shaped flowers along their stems that bloom from summer until fall. Hollyhocks are short lived perennials or biennial plants. The short lived perennials will last 2 to 3 years depending on the variety and climate, then will need to be replanted. Biennials mean the first year the plant just grows vegetatively. The second year it sends up a flower stalk, then dies in fall. However, hollyhocks are also rampant self sowers so if you leave some baby hollyhocks in the garden each fall, you’ll have a some in flower each summer. Hollyhocks grow best in USDA zone 4 to 8 climates.
The flowers range in colors from white to deep red and purple. There are single and double flower shapes and although the plants can grow to 9 feet tall, there are dwarf versions that can grow well in containers.
If grown in full sun on fertile, well-drained soil, hollyhocks will thrive in most locations. Plant hollyhocks in groups so they can support each other during wind storms and not blow over. Also, plant away from the drip line of a building so soil doesn’t splash up onto the bottom leaves. This splashing encourages diseases, such as hollyhock rust, to begin. Hollyhocks also need good air circulation to prevent diseases.
Support tall hollyhocks in windy locations with stakes placed around the clump of plants and twine or Velcro plant ties used to support the flower stalks. Install these stakes and ties once the flower stalk forms, but before it starts to flower.
Hollyhocks need only compost in spring for fertilizer. If growing on poor fertility soils, also add an organic balanced fertilizer such as 5-5-5.
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