How to Grow Altissimo Roses

This fragrant heirloom rose has been around since the mid 1960‘s and is a favorite in many home gardens because of its easy care and long blooming season.

The Altissimo rose is a disease-resistant climber that produces large, single-petal, fragrant red blooms all summer long if cared for properly.

Use these guidelines for planting and growing this show-stopping rose bush in your home garden.

Appearance 

The Altissimo rose produces blooms in a single petaled layer which can be up to 5 inches across.

The blood red petals surround a bright yellow center stamen, providing an eye-catching contrast of colors.

This is a vigorously blooming rose and will repeat bloom throughout the growing season and will provide an endless flush of red blooms all summer.

Planting Location

altissimo rose care

Altissimo roses prefer a sunny location and well-draining fertile soil, and these growing requirements are easily met.

Select a planting location that will receive at least 6 hours of direct sun each day, with 8-10 hours of direct sun being preferable.

This delightful heirloom rose is hardy in growing zones 5 and above and is rarely bothered by pests.

The Altissimo rose is a climber and the planting location will need enough space for some type of structure for the canes to climb on.

A mature Altissimo rose can reach up to 15 feet in cane length, but the bush can be kept pruned to any size desired.

Amend Soil

The selected planting location may not have ideal soil, but that’s easy to amend.

Even good soil will benefit from the addition of compost prior to planting an Altissimo rose bush.

Start by digging a hole twice as deep and twice as wide as the rose bush’s container.

Mix the removed soil with compost at the rate of two parts soil to one part compost.

Backfill the planting hole halfway with the mix and lightly water the soil.

Planting a Container Grown Altissimo Rose

rose seedlings

Carefully remove the rose bush from the container by slicing the container down opposing sides with a utility knife and gently pulling the container away.

Hold the bush, roots facing down, over the planting hole and gently tap on the soil around the roots to loosen it.

Unwind any roots that are wound around the root system and place roots and soil into the center of the planting hole.

Add or remove a little soil mix to keep the bud union at the level with the ground before backfilling the entire planting hole.

When the bud union (knot where the roots and main bush stem meet) is at the right height, gently backfill the hole, firm the soil and water roots well to ensure there are no air pockets in the soil and all roots are in contact with the soil.

Planting a Bare Root Altissimo Rose

When ordering rose bushes from a catalog flower company, the rose bush will arrive in a ‘bare root’ stage.

That term simply means the roots will be exposed and the rose bush will not be in soil nor a container.

A bare root rose bush will need to be planted as soon as it arrives.

Prepare the planting hole and soil mixture a described above when planting a bare root Altissimo rose, but instead of backfilling the planting hole halfway with soil mix, create a cone-shaped mound of soil mix in the center of the planting hole.

The tip of the cone of soil should be almost even with the ground surrounding the hole.

Set the rose bush on top of the cone of soil and gently spread the bare roots of the Altissimo rose bush over the cone of soil so they cascade down all sides of the soil cone.

Make sure the bud union is even with ground level before backfilling the hole, then backfill with soil mix, gently patting soil on the roots to ensure they are all in contact with the soil.

Water roots well.

Attract Pollinators

flower pollinators

The bright yellow stamens are filled with pollen and make an ideal food source for pollinators.

Bees are very attracted to the pollen-rich and fragrant blooms of Altissimo roses.

The single petal, open faced blooms make an ideal landing place for a wide array of pollinators, like birds and butterflies also.

This rose will provide long lasting bloom beauty, fragrance and a living show of pollinators flying in for a meal.

This is an ideal rose to have in the landscape if you have a garden or bee hives.

Uses for Altissimo Rose

This climbing rose has an upright growing habit and is easy to train to grow on any type of support.

The plant will also produce hardy canes that will reach a mature length of around 9 feet.

Plant one on either side of an entry way to provide a natural and colorful arch, use to cover a garden archway or plant along a fence.

Anywhere that provide the plant with a little upright support is ideal for the Altissimo rose.

Since the plant will only reach around 9 feet in height, it’s not an ideal rose for use as a pergola covering or anywhere else where a shade-providing plant is desired.

Hardy Plant

Altissimo roses are hardy and will easily grow in zones 5-10, and can be grown in colder climates if provided with winter protection.

In climates with cold winters, grow the rose in large containers that can be brought indoor to a sheltered location to over-winter.

Cut the plant back to 3 feet in height, water container well and place inside a garage or basement that will have a temperature of above 32 degrees all winter.

Wrap entire container and plant with several layers of newspaper, cardboard or similar substance to hep protect the roots from freezing.

Return container to the outdoors in spring after temperature has warmed to above freezing.

Unwrap container, water and feed rose.

To over-winter roses that are planted in-ground in extremely cold climates, cut rose back to 3 feet high in late fall after leaf drop.

Water thoroughly, then mound up fall leaves or other organic matter around and on top of plant until it’s no longer visible. This will help prevent the roots from freezing and the roots from being heaved out of the soil during the winter.

 Uncover rose plant in early spring when temperature rise above freezing, water and feed.

This rose is disease resistant and tolerant of partial shade.

It’s hardy nature and easy care make it a great rose for novice gardeners to start out growing.

It’s also a great rose for experienced gardeners who just want an easy care, continuous blooming rose in their landscape.

It naturally dead-head spent blooms, so pruning is not needed unless over-wintering or you want to keep the plant at a desired height.

After Care

plant care

Regular weekly waterings and a layer of organic mulch to help retain soil moisture and prevent weed growth are essential to keep the rose bush healthy and thriving.

Deadhead the spent blooms and prune away any diseased or dead canes as needed to promote new growth. Save severe pruning jobs until early spring.

Side dress with a balanced 10-10-10 fertilizer once in the spring.

Provide a trellis, arbor or other structure for the climbing Altissimo rose to adhere to and it will reward you with a multitude of large showy, fragrant red blooms from spring through fall.

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