Pink Double Knock Out® Rose – Tree Form

Rosa x 'Radtkopink' (PP#18,507)

1 Review

Pink Double Knock Out® Rose – Tree Form

Rosa x 'Radtkopink' (PP#18,507)

1 Review

This product is currently out of stock and unavailable.


How are the heights measured?

All tree, and nothin' but the tree! We measure from the top of the soil to the top of the tree; the height of the container or the root system is never included in our measurements.

What is a gallon container?

Nursery containers come in a variety of different sizes, and old-school nursery slang has stuck. While the industry-standard terminology is to call the sizes "Gallon Containers", that doesn't exactly translate to the traditional liquid "gallon" size we think of. You'll find we carry young 1-gallons, up to more mature 7-gallons ranging anywhere from 6 inches to 6ft.

How does the delivery process work?

All of our orders ship via FedEx Ground! Once your order is placed online, our magic elves get right to work picking, staging, boxing and shipping your trees. Orders typically ship out within 2 business days. You will receive email notifications along the way on the progress of your order, as well as tracking information to track your plants all the way to their new home!

Why are some states excluded from shipping?

The short & sweet answer is: "United States Department of Agriculture Restrictions." Every state has their own unique USDA restrictions on which plants they allow to come into their state. While we wish we could serve everyone, it's for the safety of native species and helps prevent the spread of invasive disease & pests. We've gotta protect good ole' Mother Nature, after all.

About Me


The Double Pink Knock Out® Rose in a tree-form is a taller plant, with a rounded crown on a short stem. It combines all the beauty and endless flowering of Knock Out roses with the extra height of a small tree, so the flowers are brought right up to your view. It grows to about 6 feet tall, with a crown that is 3 feet across. From spring to fall it is covered with large, double, rich pink flowers, set against healthy, glossy foliage. For trouble-free rose growing it can’t be beaten, and it grows easily in almost every garden, from zone 5 to zone 9. Use it in narrow beds for height, or in the middle areas of larger beds. Plant a row along a picket fence, or grow it in a large planter or container, with room beneath for lots more flowers.

  • Double pink flowers on a short tree
  • Very easy to grow
  • Always in bloom, spring, summer and fall
  • Naturally healthy and resists rose diseases
  • Perfect in beds or planters

Grow your Double Pink Knock Out® Rose Tree in full sun, although it will tolerate a couple of hours a day of shade well. It grows best in heavier soils, enriched with plenty of organic material, and they should be kept moist, but well-drained. Unlike most other roses, it is resistant to black-spot, mildew and rust, and so vigorous pests are ignored. A simple pruning in spring is all the care it needs, because the flowers drop naturally, so dead-heading is not needed. In containers use house-plant compost mixed with one-third garden soil.

Plant Hardiness Zones 5-9
Mature Width 3-4
Mature Height 5-6
Sun Needs Full Sun, Partial Sun
Zones 5-9

The Knockout Roses have been so successful in making rose growing incredibly easy, and totally rewarding, with none of the problems of older rose varieties. The Double Pink Knockout Rose is a top-rated favorite, and if it has any faults at all, it is the height, which at 3-4 feet is great for a low hedge, or the front of a bed, but not so great if you are looking for height, and want to bring those gorgeous blooms right up to eye level. So we asked our specialist growers to mount this wonderful rose on a tall and sturdy trunk, adding a permanent 3 feet to its height, and giving us a wonderful plant for the middle of a bed, for an elevated hedge, or to use in planters, leaving lots of room below for a profusion of complementary flowers.

Roses are certainly the queens of the garden, and everyone loves them, but older varieties usually had flowers in early summer, and sometimes in early fall, and that was it – bare twigs or green leaves for the rest of the year. Perhaps OK in a big garden, where there are lots of other flowering shrubs, but not so good in a smaller one, where we want to have flowers for as long as possible from every square foot. The Pink Knockout Rose is different, beginning to bloom almost as soon as the new growth appears in spring. It keeps blooming and blooming right through the summer and up to the first frost, and every bush almost always has several blooms on it. And what blooms they are – full, double flowers 3 inches across, with 35 large petals in every flower. Their glowing pink color looks superb in all lights – staying strong in sunlight and holding its strength in the evening, when darker colors can disappear. 

Growing Pink Double Knock Out Rose Trees

Of course, if you have grown roses before, right now you will be thinking, ‘what about diseases?’ Well, one of the goals in breeding the Knockout Roses was to make them disease free, and they are. You won’t see the leaves turning black and yellow, before falling off (black spot), or becoming covered in dirty gray-white powder (mildew), or with black blisters on the leaves (rust). Like all the other Knockout Roses, the Double Pink variety is resistant to these nasty diseases, and the foliage is always glossy, rich green, and unblemished. Yes, like any rose, some pests are possible, like aphids, but with the toughness and vigorous growth of this rose, you probably won’t even notice them. 


The Pink Knockout Tree-form Rose has a single, upright trunk, about 3 feet tall, and on top is a rounded bush that grows about 3 feet across and wide. The glossy, green leaves are always healthy looking, but much of the time you will hardly be able to find them for the profusion of blooms in spring, summer and fall. As well, you don’t even have the chore of removing dead blooms, as with this rose, they just fade away and drop naturally. Hardy from zone 5 to zone 9, you can grow this plant almost anywhere in the country, in both cool and hot areas. 

Choose a sunny location for you bush, but if you only have partial sunlight, this is one of the few roses that will grow well even with a few hours of shade. It is important to water your plant regularly not only when it is newly-planted, but also whenever the soil is becoming dry. The plant will tolerate dry conditions, but it usually reduces its flowering when dry, so keep watering well to avoid that.

Planting and Initial Care

This rose will grow well in most soils, but it prefers heavier soils, and even grows on well-drained clay – roses are a great choice if your garden is on clay soil. It will not grow so well on very sandy soil. Because this rose is such a vigorous and continuous grower, it needs plenty of feeding. Dig in lots of rich organic material, like garden compost or rotted manures, when preparing the planting hole. Mulch each fall or early spring with more of these rich materials. As well, feed with rose food, when planting, then in spring and again in mid-summer. In early spring, trim your bush by removing any thin branches close to the bottom, and cut back the sturdier ones. New shoots will soon develop, and the crown of your rose-tree will quickly re-build itself. Be careful not to cut below the point where the crown attaches to the stem

History and Origins of the Pink Double Knock Out Roses

Rose breeder Will Radler introduced the first Knockout Rose over 20 years ago now, and it won the All-America Rose Selections prize in 2000. You don’t get that just on looks, but only after the rose has been grown across the country successfully. That guarantees you’re success. Since then Radler has added several new roses, based on that original, which is officially called ‘Radrazz’. 

When breeding plants, many seedlings are usually grown, and among the brothers and sisters of ‘Radrazz’ was a similar rose, just as tough, but with red flowers and many more petals. He called it ‘Radtko’, or Double Red Knockout. Then, among 500 plants of Double Red Knockout growing at a nursery in Granby, Connecticut, David F. Cockcroft spotted one with gorgeous pink flowers – a natural mutation had happened. He called it ‘Radtkopink’, and it became the Double Pink Knockout Rose. It was patented in 2008. Finally, to create a taller bush, we asked our growers to attach stem pieces of this plant to a sturdy rose branch, of a special variety, with strong roots and a stiff, upright trunk. 

These unique plants take special skills to produce, and we have some perfect examples on offer. The demand for tree roses is much bigger than the supply, so our plants will soon be gone. Order now – while we can still satisfy your order.

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Pink Double Knock Out® Rose – Tree Form

Rosa x 'Radtkopink' (PP#18,507)

1 Review