The Knock Out® Roses (3 Gallon)!


Out of stock

NOTE: We have SOLD OUT of our online inventory! This item may still be in stock at our retail location in Sea Girt, NJ for in-store pickup or local delivery only. To find out what we have in stock, please call (732) 449 – 9189!

Size: 2.703 Gallons/10.232 Liters

(Descriptions & Photos Courtesy of Star Roses & Plants)

Product Description

The Knock Out® Roses

The Knock Out® Roses are a classic, must-have for all garden lovers.


Before you plant your The Knock Out® Family of Roses, look at how much light the area is getting. Roses require full-sun, which means areas that get at least 6 hours of light—they would love 8 hours!

When planting roses, you want to make sure the hole is as deep as the pot. The root ball should be even with the soil surface. You can tug loosely on the roots so that they do not remain in the root ball. It is important that the soil is fertile, well-drained as roses do not like to sit in water.

If your soil is more clay-like, then you’ll want to break it up because water doesn’t penetrate clay and that can cause root rot. Also, you can use peat moss or sand to help make room for oxygen in the soil! We recommend mixing in Bumper Crop Organic Soil Builder as an amendment to the soil to help provide nutritional value.

Check out our Barlow’s TV episode on planting roses, click here!


The Knock Out® Roses use a lot of water, but don’t want to sit in it as previously mentioned. These plants need 1 inch of water ONCE per week! Be sure to keep the foliage dry when watering. It’s best to water early in the morning, between 5 AM and 8 AM, to allow the foliage to dry if it gets wet while watering. You’ll want to avoid watering it at night because then the foliage will remain wet for a long period of time which is a field day for fungus! Mid-day watering hurts your water bill, not the plant, as water gets lost to evaporation instead of feeding your rose bush.


The Knock Out® Family of Roses are heavy feeders! In order to get your rose bush to produce a lot of blooms, they’ll require abundant nutrients. Use a balanced garden fertilizer, like Rose-tone, so that the plant gets both macro and micro nutrients. If you are using water-soluable fertilizer, then feed it every day for 10 days. Heavy rain after feeding could reduce the amount of fertilizer that gets taken in by the plant. If using a granular fertilizer, feed in 3-4 week intervals. With time-released fertilizer, use it once per month.

Tip: water the plant first, then add fertilizer as nutrients follow wet soil down to root zone and won’t be pushed pas the roots by too much water.


Remove the spent flowers to encourage the plant to keep blooming. If you don’t, energy will be diverted away from flower production as it’s still sending up to the spent bloom. Waiting too long to deadhead will get you highs and lows of flowering. Be consistent!


It’s important to prune your roses! If you don’t, the shrubs will get woody and inefficient in sending nutrients to the top of the plant. Unpruned plants may get taller but will sacrifice leaves and flowers on the lower portion. Also, improve air flow by removing canes that are growing through the center of the plants.

Spring is the preferred time to prune. If you can’t prune until the Fall, then wait until the plant is dormant—most of the leaves are gone. Pruning before this can cause the plant to think it needs to grow. This new, unhardened growth will take severe damage from the frost.

Additional Information

Weight N/A
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Double Pink®, Double Red®, Pink®, Red®, Blushing®, Coral®, Rainbow®, Sunny®, White®, Peach®

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