Using Shrub Roses in Your Landscape
By
The National Gardening Association,
Bob Beckstrom,
Karan Davis Cutler,
Kathleen Fisher,
Phillip Giroux,
Judy Glattstein,
Mike MacCaskey,
Bill Marken,
Charlie Nardozzi,
Sally Roth,
Marcia Tatroe,
Lance Walheim, and
Ann Whitman
Shrub roses are a diverse group of plants that don’t neatly fit into any of the other rose categories. Shrubs, especially the modern ones, are popular because of their long season of bloom, pest and disease resistance, and versatility in the landscape.
Most shrub roses are easy-to-grow roses that can get by on little care, other than regular watering and occasional fertilizer. Shrub roses can get along fine without much pruning, but you still want to deadhead them to keep them blooming over the entire season. A light shearing in late winter or early spring (earlier in mild climates, later in cold climates) keeps them compact. Otherwise, prune to keep some of the large varieties in bounds.
Many shrub roses are grown on their own roots and are pretty hardy, if not extremely so. But you still want to mound soil over their base in cold winter climates to protect them from freezing and thawing and to ensure that not all the above-ground parts are killed if the temperature gets really cold.
Shrub roses really come into their own as landscape plants. If you’re thinking about planting any flowering shrubs, think hard before you overlook shrub roses. You can use sprawling types as ground covers and upright ones as hedges, and the smaller ones are ideal for pots, perennial borders, and low hedges.
Even though shrub roses are diverse, some that resulted from the same breeding programs have similarities:
Hardy shrubs: Several breeding programs have concentrated on creating hardy shrubs for cold climates. These shrubs include Buck hybrids, such as ‘Prairie Princess’ and ‘Applejack’, which were bred by Dr. Griffith J. Buck at Iowa State University, and the Morden and Explorer (which are made up of varieties named after famous explorers) shrub roses from Canada. Most of these hardy shrubs can withstand temperatures down to –15° to –25°F (–26° to –32°C) and lower and have excellent disease resistance.
Meidiland roses: These roses originate in France, from the renowned Meilland hybridizers. Most are sprawling plants that are useful as ground covers or hedges. They’re good repeat bloomers, have excellent disease resistance, and are generally hardy to about –10°F (–23°C).
David Austin English roses: These shrubs are meant to combine the ever-blooming characteristic and disease-resistance of modern roses with the flower form and fragrance of old roses. They’ve been selected by the famous rose hybridizer, David Austin. The problem is that they don’t always keep that promise. Although many are beautiful roses, some varieties do not rebloom and are prone to disease, especially black spot. Also, many Austin roses are very vigorous plants that get huge, especially in mild-winter climates. So choose carefully. Most varieties are hardy to about 0°F (–18°C).
Generosa roses: These are sort of a French version of David Austin’s English roses. Developed by one of France’s oldest nurseries, Roseraie Guillot, plants tend to be smaller than the Austins, have equal or stronger fragrance, and have good disease resistance (although black spot can be a problem where summers are hot and humid). Most varieties are hardy to about 0°F (–18°C).
Flower Carpet: These well-behaved, spreading plants make especially good ground covers. They’re easy to care for, very free-blooming, and disease resistant. Flower Carpet roses are generally hardy to –10°F (–23°C).

Gardening Glossary
annuals
Plants that complete their entire life cycle within one growing season. The plant germinates from seed, grows and blooms, and then produces seed and dies.

Gardening Glossary
biennials
A plant that take two growing seasons to complete its life cycle. It germinates and grows leaves and stems in the first year; produces flowers and fruit (seed) in the second, and then dies.

Gardening Glossary
bolt
When a plant flowers or produces seed prematurely.

Gardening Glossary
cold frame
A wooden or concrete block box in which you can grow plants or hold dormant during the cold winter months.

Gardening Glossary
cole crops
A family of vegetables, including broccoli, cabbage, cauliflower, kale, and Brussels sprouts. They thrive in cooler weather.

Gardening Glossary
complete fertilizer
Any fertilizer that contains all three of the primary nutrients, N-P-K (nitrogen, phosphorus, potassium). Phrase is based on regulations governing the fertilizer industry. Does not mean that the fertilizer literally contains everything a plant needs to thrive.

Gardening Glossary
deadheading
The practice of pinching or cutting off spent flowers

Gardening Glossary
evaporative-pad humidifier
A humidifier in which fans blow across a moisture-laden pad that sits in a reservoir of water.

Gardening Glossary
harden off
The process of acclimating plants grown indoors gradually to the brighter light and cooler temperatures of the outside world.

Gardening Glossary
hardiness
The ability of a plant to survive is called its hardiness.

Gardening Glossary
humus
A stable end product of organic-matter decomposition that's believed to increase microbial activity in soil, improve soil structure, and enhance the root development of plants.

Gardening Glossary
Bacillus thuringiensis Bt
An effective bacteria that attacks only the larvae of caterpillar family insects. It is safe to other insects, animals, and humans.

Gardening Glossary
macronutrients
Mineral nutrients that plants need in the largest quantities: nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur.

Gardening Glossary
mulch
Organic or inorganic material placed over the surface of soil, usually directly over the root zone of growing plants. Used to conserve moisture, kill weed seedlings, modify soil temperature, provide attractive covering to garden beds.

Gardening Glossary
organic matter
Once-living stuff like compost, sawdust, animal manure, ground bark, grass clippings, and leaf mold (composted tree leaves). Used to enrich soil and improve soil texture.

Gardening Glossary
perennials
Any plant with a life cycle of three or more years. Herbaceous (non-woody) perennials include flowering plants and herbs, mainly. Woody perennials include trees and shrubs. Longevity depends on the plant and growing conditions.

Gardening Glossary
pH
The measure of soil's acidity. Soil with low pH means it's too acidic; soil with high pH means it's alkaline. Most plants grow best in soil with a pH value between 6.5 and 7.2. Neutral soils measure 7.

Gardening Glossary
photosynthesis
The process through which plants take nutrients from the air and from the water in the soil to produce sugars that fuels the plant's growth.

Gardening Glossary
primary nutrients
Nitrogen, phosphorous, and potassium are the three nutrients plants need in the largest quantities.

Gardening Glossary
root crops
Plants with edible underground roots such as onions, carrots, beets, potatoes, turnips. Most root crops are cold-weather crops.

Gardening Glossary
self-blanching
A type of cauliflower with leaves that naturally curl over the head and exclude light. Requires cool temperatures for leaves to curl effectively.

Gardening Glossary
sets
Small onion bulbs, about 1/2-inch wide, that were started from seed the previous year. Grow onion sets with the pointy end up.

Gardening Glossary
side-dressing
The act of adding a small amount of fertilizer around or "on the side" of plants after they're growing.

Gardening Glossary
succession planting
Planting small, 2-to-4-foot patches of plants every two weeks throughout the growing season so that you can harvest a crop over an extended period of time.

Gardening Glossary
thinning
The act of cutting the least robust seedlings in your garden to give the healthier plants more room to grow.

Gardening Glossary
vining crops
Crops that grow on vines, such as cucumbers, melons, pumpkins, and winter squash. They usually require support (staking, trellising, etc.) to keep them off the ground.