Mature size & growth rate

How big does Altissimo Rose (Rosa 'Altissimo') get?

Also called Altissimo, Altus, Delmur.

More about altissimo rose

About Altissimo Rose

Rosa 'Altissimo' · also called Altissimo, Altus · flowering

Altissimo is a vigorous large-flowered climber bearing single, blood-red blooms up to 13 cm across, each centred on a boss of golden stamens against glossy dark foliage. Introduced by Delbard in 1966, it repeat-flowers from early summer to autumn and is notably disease-resistant, making it a reliable wall or pillar rose for warm, sunny sites.

Mature size: Around 2.5-4.5 m (8-15 ft) tall and 1.8-2.4 m (6-8 ft) wide when trained on a support.

Watch for — Aphids: Cluster on soft new shoots and buds in spring; blast off with water or treat with insecticidal soap before they distort growth.

Indoor size vs how big it gets in the wild

Altissimo Rose is a garden shrub whose final size is set more by your secateurs than by the plant — pruning, not luck, decides how big it gets. Indoors and in a pot, expect around 2.5-4.5 m (8-15 ft) tall and 1.8-2.4 m (6-8 ft) wide when trained on a support.. A pot, your light levels and a little pruning are what set the final size in a home, far more than the plant's theoretical potential.

Left unpruned it builds a woody framework that gets taller and wider every year; with annual pruning you hold it at whatever size suits the space.

Growth rate and years to mature

Altissimo Rose is a fast grower. Realistically, expect two to four years from a young plant to a room-filling specimen in good light. Its feeding profile backs this up: feed in early spring as growth begins and again after the first main flush with a balanced rose fertiliser; mulch with compost or rotted manure annually. stop feeding by late summer so new growth hardens before frost.

Want this turned into the right next pot at the right moment? The pot size calculator and the altissimo rose repotting guide cover when and how much to size up — pot size is one of the biggest levers on how fast altissimo rose grows.

How to keep altissimo rose smaller

You are not stuck with the maximum size. For altissimo rose specifically, these are the levers, in order of impact:

Prune altissimo rose annually at the right time for its type — this is the primary, expected way to control its size.
Remove the oldest, thickest stems at the base each year to keep it open and within bounds.
Growing it in a large container rather than open ground naturally restricts the ultimate size.
Avoid heavy feeding if you want to limit growth — rich soil and lots of nitrogen drive bigger, faster shrubs.

The keep-it-smaller method, step by step

Prune at the right time. Time the cut to altissimo rose's type (after flowering for many spring shrubs, late winter for summer-flowering ones) so you do not lose the next display.
Take out the oldest stems. Remove up to a third of the oldest, thickest stems at the base to renew the shrub and contain it.
Shorten the rest. Cut the remaining stems back to an outward-facing bud at the height and width you want.
Restrict the roots. For a permanent size cap, grow it in a large container rather than open ground.

How to grow altissimo rose bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for altissimo rose the accelerators are:

Plant it in open ground in good soil — far more vigorous than a container-restricted plant.
Full sun (which it wants) plus an annual mulch and feed gives the strongest growth.
Water well through the first establishment years; a settled root system drives the fastest size gain.

Light is almost always the ceiling. The altissimo rose light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When altissimo rose outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for altissimo rose:

It shades or crowds neighbouring plants, or blocks a path it used to clear.
Bare, woody, unproductive centres with growth only on the outside — a sign it needs renovation pruning.
It has clearly exceeded the space you allotted and an annual trim no longer holds it.

If it is the pot rather than the room, it is a repotting job, not a goodbye — see the altissimo rose repotting guide. If you want more of this plant instead of a bigger one, the altissimo rose propagation guide turns prunings into new plants.

Altissimo Rose size — frequently asked questions

How big does altissimo rose get?

Altissimo Rose reaches around 2.5-4.5 m (8-15 ft) tall and 1.8-2.4 m (6-8 ft) wide when trained on a support. when grown indoors. Left unpruned it builds a woody framework that gets taller and wider every year; with annual pruning you hold it at whatever size suits the space.

Is altissimo rose slow or fast growing?

Altissimo Rose is a fast grower. Expect two to four years from a young plant to a room-filling specimen in good light. Altissimo Rose is a garden shrub whose final size is set more by your secateurs than by the plant — pruning, not luck, decides how big it gets.

How long does altissimo rose take to reach full size?

Roughly two to four years from a young plant to a room-filling specimen in good light. Light, pot size and feeding move that timeline more than anything else.

How do I keep altissimo rose smaller?

Prune altissimo rose annually at the right time for its type — this is the primary, expected way to control its size. Remove the oldest, thickest stems at the base each year to keep it open and within bounds. Growing it in a large container rather than open ground naturally restricts the ultimate size. Avoid heavy feeding if you want to limit growth — rich soil and lots of nitrogen drive bigger, faster shrubs.

How can I make altissimo rose grow bigger or faster?

Plant it in open ground in good soil — far more vigorous than a container-restricted plant. Full sun (which it wants) plus an annual mulch and feed gives the strongest growth. Water well through the first establishment years; a settled root system drives the fastest size gain.