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Hollyhock (32)
Hollyhocks (Alcea rosea) are towering, upright biennials or short-lived perennials grown for their tall flower spikes (often reaching 5 to 7 feet in height) and their strong presence in the garden or flower field. Lately, hollyhocks have entered the cut flower scene, and we understand why! They might not have the longest vase life, at around 7 days, and it may take some experimentation to achieve hydration post-harvest (try sealing the cut ends with a flame or hot water), but their uniqueness and incredible beauty make the extra effort worth it. This is a great option for local markets, as hollyhocks aren't grown en masse and shipped in from other countries - your florists will appreciate the novelty. They thrive in full sun and well-drained, moderately fertile soil, and are hardy in USDA zones 3-9, 10 if you're lucky - pretty much all of the north, central and southwestern US. In the hot humid south, success will vary. Most bloom in their second year, so a fall planting should produce flowers the following year. Widely used for back-of-the-border plantings, living privacy screens, and vertical interest, they likely bring about a sense of nostalgia when you see them growing against an old barn out in the country. Tall, top-heavy plants may benefit from staking to avoid bent stems, and good air circulation (and a preventative fungicide) to reduce the risk of rust. Hollyhocks will self-sow if left to go to seed, but successive generations won't always look like the parent plants. Although technically a biennial, they might perennialize if conditions are right - but don't expect their return every spring. For the longest vase life, harvest when the bottom flowers are open and the remaining spike is still in bud. They can send up a second flush of flowers after the first is harvested - cut back to about a foot above the ground at harvest to encourage re-growth. There are a plethora of hollyhock varieties out there, but we are offering mostly double forms in some of the most delectable colors, highly sought in the cut flower market.
Please note that perennial orders must be placed separately from other plug orders. The minimum order is two trays, which may be mixed and matched with all other perennials in this collection. Learn more about our perennial program here.
About Tray Sizes
210 and 125 cell trays are full-sized trays, and three of these will fit in a shipping box.
50 cell trays are half-sized trays (unless otherwise noted) and two of these are the equivelent of one full sized tray. Six of these will fit in a shipping box.
18 and 32 cell trays are full sized trays specifically for our vernalized perennials. These have their own set of shipping rules (find details HERE) and cannot be combined with items grown in 210, 125, or 50 cell trays.
Growing Guides
Click here to access all of our comprehensive growing guides.

Common Name | Hollyhock |
Genus | Alcea |
Species | Alcea rosea |
Family | Malvaceae |
Life Cycle | Biennial to short-lived perennial |
Format | 32 cell plug tray |
Plug Care | Transplant plugs promptly and water deeply at planting time. Keep evenly moist (top 2 inches of soil) until new growth appears, then reduce to weekly watering unless in extended dry periods. |
Netting / Staking | Tall flower spikes (up to 7 feet) benefit from support - stake early using sticks, bamboo canes or netting in windy sites. Can also grow along a fence or south facing wall for support. |
Temperature Range | Hardy zones 3-9; thrives in temperate climates. In extremely humid regions, generous spacing and airflow is necessary to avoid rust disease. |
Spacing | 24" (2') is adequate to reduce disease risk and support air circulation. |
Soil Preference | Fertile, well-drained soils; amend with compost before planting. Performs best in neutral to slightly alkaline soils. Will tolerate poor quality soil but stems will be smaller and flowers will be fewer. |
Day Length | Long-day plants which bloom at the peak of summer. Full sun is ideal; partial shade acceptable in regions with intense heat. |
Pinching | Not necessary. Typical growth is one to 5 large central stalks depending on age of clump and nutrient availability in soil, with smaller side branches. Pinching the central stem might encourage more side branching, but more trialing is needed. |
When to Plant | Transplant plugs in spring or early autumn. Avoid planting in the summer heat; spring planting establishes and some varieties will flower first year. All varieties will bloom the next year after a fall planting. |
Harvesting | Cut individual flower stalks when half to two-thirds of blooms are open. Expect a vase life of 7-10 days, possibly longer with preservative and cool storage conditions. |
Post Harvest Care | Re-cut stems at an angle under water, immediately place in clean holding solution/ floral preservative, and store in a cooler to maintain vase life. Avoid exposure to ethylene gas to prevent petal damage and flower drop. |
Diseases / Insects | Rust (Puccinia malvacearum) is the primary issue - remove infected foliage and sanitize tools. Use crop rotation to avoid re-planting into soil with rust. Watch for slugs, snails, Japanese beetles, spider mites and hollyhock weevils. |
Bailey's Notes | Our selected Chater’s Double Salmon, Fruity Mix, Nigra, Peaches ’n Dreams, and The Bride varieties offer sturdy, impressive flower spikes ideal for tall arrangements or event installs. Grown from plugs, these cultivars establish quickly in the second year and flower into a stunning display which you might not even want to bring in from the field. Try growing them as a living wind screen, or a photo backdrop. |
Resources | NA |