Plant spacing is based on the ultimate width of the plants. This figure is normally given as a range; for example, 3-5’. If you live in a cold climate and/or want plants to fill in more quickly, plan to space at the shorter end of the range. If you live in a warm climate, are on a limited budget, or are willing to wait longer for plants to touch, use the higher end of the range. Using the larger number is recommended when calculating distance from a building or structure. There’s really no such thing as "maximum spacing": if you don’t want your plants to touch, you can space them as far apart as you’d like. All plant spacing is calculated on center, or in other words, the centers of the plants are spaced one half of their eventual width apart:
Unless you are planting in a straight line, as you might for hedges or edging, space your plants in a staggered or zig-zag pattern for a more interesting and naturalistic look:
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DescriptionTry to find a plant that showcases the cottage-core aesthetic as well as 'Blacknight' hollyhock. We'll wait. 'Blacknight' features deep purple-black flowers with a yellow eye, positioned along a single stalk that reaches up to six feet tall. We think this earns it a place in every cottage garden. Its towering height makes it an excellent option for growing against walls and fencelines, or as an eclectic backdrop to low-growing perennials. 'Blacknight' is especially attractive to hummingbirds and butterflies. Though it may require some staking, this hollyhock will be a reliable and intriguing perennial in your garden.
Hollyhocks (or Alcea) have long been an old-fashioned cottage garden staple. This sun-loving classic boasts vibrant flowers, tall stems, and prominent lower foliage, which makes quite a statement in the landscape. Hollyhocks are easy to grow in rich soil and are fairly low maintenance, only requiring a heavy trim after flowering. Even near black walnut trees, hollyhocks manage to find a way to shine. Plant it as a specimen or in masses for a tall wall of color that will never cease to impress!DetailsBotanical name:Alcea rosea ‘Blacknight’ Common name: Hollyhock Zone: 3-9 Sun exposure: Sun (6+ hours sun) Height x width: 5-6' X 24" Flower color: Deep purple to black Foliage color: Green Season of Interest: Summer Bloom time: Summer Features: Rabbit resistant, deer resistant, juglone tolerant Uses: Background, borderHow To GrowSoil: Rich, moist, well-drained soil. Light: Full sun Water: Average, keep well-watered until established, once established they can tolerate some drought. Spacing: 24 inches Fertilizing: Hollyhocks benefit from light fertilizer in the spring. Winterizing: prune back 6-8 inches above the ground before over-wintering. Additional mulching is optional. ‘Blacknight’ is a hardy perennial unlike other varieties of Hollyhock. Maintenance & Pruning: Prune back after flowering to 6-8 inches above the ground. Staking may be required in high wind locations.