Costa Farms


Passionate about plants? So are we! Costa Farms is a wholesale grower that discovers, develops, and grows plants for your home and life -- indoors and out. We’re your online gardening resource for plant info and inspiration. Our articles, blogs, tips, and photos help you use plants to beautify your living spaces and enhance your life.

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Rose, Knock Out

Rosa Knock Out series

Rose, Knock Out Plant Features

If you love roses, but don't like the idea of pampering them, then Knock Out rose is the way to go. This nonstop bloomer was developed in Wisconsin so it will tolerate hot summers, cold winters, and resist a host of diseases than can cripple some other rose varieties. Knock Out rose can grow 5 feet tall and wide so use it in a shrub or perennial border or in large tubs and planters. Once established, Knock Out rose requires minimal attention. Colors include red, pink, and yellow. Hardy from zones 5-9.

Knock Out Rose Questions?
Email us and one of our rose experts will get back to you.

Rose, Knock Out Growing Instructions

Knock Out rose prefers a spot with full sun and moist, but well-drained soil. Knock Out rose also appreciates a layer of mulch over the soil, especially in hot-summer climates to help keep the ground cool and moist. The best time to prune Knock Out rose is in the early spring, just before it breaks dormancy. Fertilize the plant in the early spring with a slow-release granular fertilizer. Like most roses, it grows best in a spot with good air flow and when its leaves don't get too much water on them from sprinklers.

Knock Out rose is not recommended for human or animal consumption.

  • Light

    Outside: Sun

  • Colors

    Pink, Red, Yellow

  • Water

    Moist, well-drained soil

  • Special Features

    Super-easy to grow

Complement your Rose, Knock Out with these varieties:
Geranium, Perennial
Plant Cranesbill Geranium around the base of Knock Out rose for a double color show.

Lavender and Knock Out Rose are simply amazing when planted together.

Creeping Jenny
Use golden Creeping Jenny as a sparkly ground cover throughout your Knock Out Rose border.