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:
Hand-picked at our greenhouse
Shipped to your door
Arrives as young plant
DescriptionDouble Knock Out® Rose (Rosa x) packs a punch with velvety, fully double, cherry-red flowers with up to 25 petals per bloom! Their sweet and spicy fragrance lightly floats through the garden. Flowers bloom for over five months, starting in early summer and persisting through frost.
Let your rose do all the hard work as it self-cleans spent flowers. No maintenance required! The disease-resistant series of Knock Out® roses have taken the world by storm. Black spot, powdery mildew, and numerous other typical rose ailments won't touch these roses.DetailsBotanical name:Rosax 'Radtko' Patent #: USPP 16,202 Common name: Rose Zone: 5 - 9 Sun exposure: Sun (> 6 hours sun) Height x width: 3-4' x 3-4' Flower color: Cherry-red Foliage color: Green Bloom season: Summer-fall Bloom time: Summer Features: Privacy & screening, heat tolerant, container plants, cold tolerant Uses: Accent, border, container gardening, cottage gardening, foundation planting, ground cover, hedge, massing, ornamental, specimen How To GrowSoil: Prefers moist, slightly acidic, well-draining soil. Roses benefit from the addition of compost, aged manure, or leafmold to the planting soil. Light: Sun (> 6 hours sun) Water: Try to keep the soil evenly moist, especially in their first growing season. Never allow the foliage to remain wet into the evening; water early in the day. Spacing: 3 - 4 ft. Fertilizing: To keep the flowers coming, feed your roses with a fertilizer blended especially for roses. This can be done after each bloom cycle. Winterizing: Spread a layer of composted manure, compost, or shredded leaves over the base of the plant in late fall after the ground freezes. Covering these mounds and the lower parts of the bushes with evergreen boughs will add protection. Pull the mounding material away from the stem as new growth emerges in spring. Prune injured branches over when new buds emerge in spring. Maintenance & pruning: Prune to remove deadwood, to control or direct growth, and to promote flowering. Wait until growth breaks in early spring before pruning. Every 2 or 3 years, remove about one-third of the old branches to stimulate new, fresh growth. There is no need to remove faded flowers because these roses are self-cleaning.
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Your Questions on Roses, Answered!
Learn how to prune roses, why the leaves are turning brown, why your plant isn't flowering, and everything else you need to know to grow roses like a pro.
I have purchased several knockout roses from Great Garden Plants and have
been delighted with the quality, price and shipping of these plants.
The plant grow so fast.
Roses every day on the breakfast table!
I ordered 6 of these in 2020, and they began producing blooms the first year. By year 2, the profusion of blooms was incredible. I highly recommend these for zones 5 and above. Unfortunately I lost 2 this winter, so not hardy enough for zone 4, despite my efforts to insulate them from the cold..
Double knock out rose
The plant has adjusted well. It has grown quickly and has produced several buds.
Happy, healthy plants. Always packaged perfectly. Growing really well. Can’t wait for them to fill out.