Repotting guide

When & how to repot Compassion Rose (Rosa 'Compassion')

Also called Compassion, Harquest.

More about compassion rose

About Compassion Rose

Rosa 'Compassion' · also called Compassion, Harquest · flowering

Compassion is an outstanding repeat-flowering climber bred by Harkness in 1972 and holder of the RHS Award of Garden Merit. Its fully double, salmon-pink blooms flushed with apricot reach about 10 cm across and carry a strong, sweet fragrance. Upright and vigorous with glossy dark foliage and good disease resistance, it suits walls, arches and pillars.

Mature size: About 3 m (10 ft) tall and 1.8-2.4 m (6-8 ft) wide when trained on a support.

Watch for — Black spot: Possible in prolonged wet weather despite good resistance; gather fallen leaves and water at the base to limit infection.

How to tell compassion rose needs repotting

Repotting on a calendar is less reliable than reading the plant. For compassion rose, watch for these signs:

Roots spiralling thickly out of the drainage holes or pushing the whole plant up out of the pot.
The pot is so packed that water runs straight through in seconds and barely wets the soil.
It has split a plastic pot, or the rootball is a solid mass with almost no soil left when you slide it out.
Growth and (for compassion rose) flowering have clearly stalled despite good light and feeding — but remember this plant likes being snug, so a little crowding alone is not a reason to repot.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot compassion rose

Only every 2–4 years, when genuinely crowded. Compassion Rose is one of the plants that genuinely prefers a snug pot — it grows and flowers better with its roots a little restricted, so resist the urge to repot it on schedule. Strong, upright and vigorous repeat-flowering climber with stiff, branching canes that train readily onto walls, arches and pillars; flowers in flushes from late spring through summer..

What size pot to step compassion rose up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Compassion Rose positively prefers a snug pot: it flowers and grows better when the roots are a little restricted. The single biggest repotting mistake here is over-potting — dropping compassion rose into a pot two or three sizes up. All that surplus soil holds water the small root system cannot use, stays cold and wet, and rots the roots within weeks. When in doubt, choose the smaller pot.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot compassion rose

Early spring, just as new growth restarts, is the ideal window for compassion rose. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting compassion rose

Confirm it actually needs it. Slide compassion rose out and check the roots. Only continue if it is genuinely packed — this plant prefers a snug pot, so if there is still soil and room, put it straight back.
Pick a pot only one size up. Choose a pot just 2–3 cm wider with good drainage. Resist anything bigger; over-potting is the main killer here.
Ease it out gently. Water lightly the day before, then tip compassion rose out, supporting the base. Tease the outer roots free only enough to stop them circling.
Repot at the same depth. Add a layer of fresh fertile, well-drained loam, set the plant so the soil line sits exactly where it did before, and backfill around the sides, firming lightly.
Settle it in. Water once to settle the soil, then let it sit. Hold off on more water until the top of the soil dries — fresh soil around a small root system stays wet for a while.

Aftercare

Because the new soil holds more water than the old crammed rootball did, ease right back on watering — let the top of the soil dry before you water compassion rose again, or you will rot the roots in the very pot you just moved it to. Keep it out of harsh direct sun for a fortnight. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for compassion rose

Compassion Rose wants fertile, well-drained loam. Likes a rich, moisture-retentive but free-draining loam improved with well-rotted manure or compost, pH around 6.0-7.0. Avoid sitting water; open up heavy clay with organic matter at planting. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting compassion rose — frequently asked questions

How often should you repot compassion rose?

Only every 2–4 years, when genuinely crowded for compassion rose. Only repot compassion rose every 2–4 years, and only when it is genuinely root-bound — it flowers and grows best slightly crowded. Step up just one pot size in spring using fertile, well-drained loam. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does compassion rose need?

When is the best time of year to repot compassion rose?

Does compassion rose like to be root-bound?

Yes — compassion rose genuinely flowers and grows best when slightly pot-bound, so do not rush to repot it. The mistake to avoid is over-potting into a much larger pot: the excess soil stays wet, the roots cannot use it, and the plant rots. Only repot every few years and only one snug size up.

Should you fertilise compassion rose after repotting?

Not immediately. Wait about 4 weeks after repotting compassion rose. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.