Rose, Knock Out


1. Light/Sun Exposure - Full to partial sun (at least 6 hours of sun a day).

2. USDA Hardiness Zones - 4 to 10.

3. Planting Distance - 4 to 5 feet apart in ground.

4. Mature Height/Spread - 3 to 4 feet tall with a similar spread.  Can be kept at a smaller size by trimming.

5. Bloom Time - Many may be blooming in their pots upon arrival and thereafter will continue their annual display from summer until first fall frost.

6. Planting Instructions - Dig a hole twice as wide and twice as deep as the pot in which your plant was grown.  Please note that many of our pots are biodegradable.  If your plant is not in a traditional plastic pot then you may place the entire biodegradable pot in the ground; otherwise, gently remove the rootball from the pot.  Partially backfill the hole with soil and place the plant into the hole. The top of the root ball should be level with the ground surrounding the hole. Refill the hole with soil, firming the soil around the plant with your fingers.  Check to be sure that the plant is not planted too deeply.  If it is, raise the plant carefully and refirm the soil.  Water thoroughly.


You don't have to waste time removing old flowers from this blooming machine. The self-cleaning Knock Out® roses take the maintenance out of growing roses. Hardy and drought tolerant upon establishment, they are truly carefree.

They thrive in very humid climates.  These outstanding plants will find a permanent home in your garden no matter how you use them.  Resistant to black spot and drought tolerant, these roses bloom continuously from spring to frost on compact, mounded bushy plants.


Although these plants will perform well in average garden soils of all types, we recommend having your soil tested periodically by the local County Extension Office.  These tests can determine if the soil needs any amendments to enhance your plants' growth and performance.  See below for our recommended practice to improve your soil without any additional testing:

1.  Spade or till the soil to a depth of 12-18 inches.

2.  To provide nutrients and improve drainage, add organic matter to your soil by mixing in a 2 to 4-inch layer of dehydrated manure, garden compost, shredded leaves, and/or peat moss.

3.  After active growth begins, periodically feed with Cottage Farms' water soluble Carefree Bud-N-Flower Booster for Roses. Plants in containers need more frequent watering and feeding, especially when in active growth and bloom.


Water - Your plants require 1" of rainfall (or equivalent watering) each week when planted in the ground.  Do not allow plants in containers to dry out.  In a container that is exposed to full sun, water it well at least once every other day, and possibly every day, during periods of intense summer heat.  You may wish to temporarily move the containerized plants to an area where they are shielded from the hot summer sun (i.e., in the shade of a tree, on a porch near an overhang).

Roses are very sensitive to over-watering, especially in heavy, poorly drained soil.  The best time to water roses is in the early morning.  Try to avoid watering the foliage as this can cause fungus problems.  If at all possible, only water around the base of the plants.

Cultivation - Roses like a loose soil surface so that water can penetrate easily to their roots. Cultivate just deeply enough to keep the soil loose and free of weeds. You may also amend the soil with the addition of organic material.

Mulching - Apply a 2-4 inch layer of shredded bark, compost or other organic mulch around your plants to promote moisture retention, maintain even soil temperatures, and to discourage weed growth.

Weeding - Keep the area around your plants free of weeds. Weeds compete with all plants for food, water and light. Walk around the garden periodically and pull weeds, including the roots, as soon as you see them.

Pruning - For most Knockout roses, pruning out and removing a few of their oldest canes each year is very beneficial if the rose plant is vigorous and still producing lots of new growth from its base.  Once a year in early spring, after the last hard frost in your area, it is recommended to trim the shrub down to about 1/3 or 1/2 it's current height. It is okay if after trimming the bush back what remains is only about 12 to 18 inches above the ground. 

Knockout roses are repeat-flowering shrub roses and should be pruned during the dormant season in late winter or early spring, depending on the climate zone where you live. The flowers are self-cleaning so deadheading isn't necessary for repeat blooms to occur unless you want to keep the rose bushes looking extra tidy.

Feeding - Feed your plants once every 2-3 weeks during the growing season with a water-soluble fertilizer such as Cottage Farms' Carefree Bud-N-Flower Booster for Roses. Discontinue feeding after September 1st so your plants can harden off for winter dormancy. Resume fertilizing when new growth appears in the spring.

Winterizing - The time to protect your plants in the garden is after the ground has frozen. At that time, apply a winter mulch of evergreen boughs, straws or leaves to prevent lifting of the plant's roots during alternating periods of freezing and thawing.

For container planting, move plants next to your home's southern foundation for added warmth and protection. They may also be moved into an unheated, protected area such as a garage or cellar. If moved to a protected area be sure you water them well once every 7 to 10 days.

In spring, remove the mulch from in-ground plantings.  Also, bring containerized plants back out into the garden sunlight where they will immediately begin to repeat their yearly garden performance.  


CAUTION: Not all plant material is edible. Though most plants are harmless, some contain toxic substances which can cause headaches, nausea, dizziness, or other discomforts. As a general rule, only known food products should be eaten. In case of ingestion, please contact your local poison control center at once and advise them of the plant ingested. Keep out of reach of children.