Repotting guide

When & how to repot Salvia yangii (Salvia yangii)

Also called Russian sage, Perovskia.

More about salvia yangii

About Salvia yangii

Salvia yangii · also called Russian sage, Perovskia · flowering

Russian sage, recently reclassified from Perovskia to Salvia yangii, is a woody-based subshrub with silvery, finely cut aromatic foliage and an airy haze of lavender-blue flowers in late summer. Tough and drought-proof, it thrives in hot, dry, sunny sites with sharp drainage and is invaluable for late-season colour and pollinators.

Mature size: About 90-120 cm tall and 60-90 cm wide (3-4 ft tall, 2-3 ft wide).

Watch for — Root rot in wet soil: Its single biggest threat is heavy, waterlogged ground, especially in winter. Plant in very sharply drained soil.

How to tell salvia yangii needs repotting

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

Roots growing out of the drainage holes, or the rootball lifting the plant proud of the rim.
Soil that has shrunk away from the pot sides and no longer holds water.
The pot is unstable because the plant has grown top-heavy.
Old, compacted, broken-down mix that stays wet too long — for a succulent that is a rot risk, so refresh it even if the pot size is fine.

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 salvia yangii

Every 2–3 years, into bone-dry mix. Salvia yangii's growth habit — upright, woody-based deciduous subshrub with silvery-white stems and a loose, airy, see-through flowering haze. — sets the pace. Russian sage, recently reclassified from Perovskia to Salvia yangii, is a woody-based subshrub with silvery, finely cut aromatic foliage and an airy haze of lavender-blue flowers in late summer. Tough and drought-proof, it thrives in hot, dry, sunny sites with sharp drainage and is invaluable for late-season colour and pollinators.

What size pot to step salvia yangii up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Salvia yangii stores water and rots in a large pot of slow-drying soil. A tight terracotta pot that dries fast is far safer than a generous plastic one. Never up-pot a succulent by several sizes.

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 salvia yangii

Spring or summer, while salvia yangii is in active growth and warm, is best — roots recover fastest then, and the plant is not sitting in cool damp soil. Avoid repotting a succulent in winter dormancy.

Step-by-step: repotting salvia yangii

Repot dry. Do not water salvia yangii for several days first. Working with dry roots and dry mix dramatically lowers the rot risk for a succulent.
Pick a snug, fast-draining pot. Choose terracotta one size up at most, with a drainage hole. Have gritty lean, gritty, very free-draining soil ready.
Tip it out and clean the roots. Slide the plant out, crumble off the old soil, and trim any black, mushy or dead roots with clean snips.
Pot into dry mix. Set salvia yangii at its original depth in dry gritty mix, firming gently. Do not bury the stem deeper than it was.
Wait a week before watering. Leave it completely dry and out of harsh sun for about 7 days so any damaged roots callus. Only then water lightly.

Aftercare

Keep salvia yangii completely dry and out of fierce sun for about a week so any nicked roots callus before they meet moisture; watering a freshly repotted succulent is the classic way to rot it. Then resume the normal lean, dry rhythm. Do not fertilise for about 3 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for salvia yangii

Salvia yangii wants lean, gritty, very free-draining soil. Thrives in poor, dry, alkaline to neutral ground and tolerates sandy or chalky soils. Heavy, wet clay is the main killer; amend generously with grit. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting salvia yangii — frequently asked questions

How often should you repot salvia yangii?

Every 2–3 years, into bone-dry mix for salvia yangii. Repot salvia yangii every 2–3 years into a snug pot of lean, gritty, very free-draining soil, ideally in spring or summer. Let it sit in dry soil and do not water for about a week afterwards so any nicked roots can callus. Over-potting and watering straight away is what rots succulents.

What size pot does salvia yangii need?

When is the best time of year to repot salvia yangii?

Should you water salvia yangii after repotting?

No — not straight away. Repot salvia yangii into dry mix and wait about a week before the first watering so any damaged roots callus over. Watering a freshly repotted succulent is the single most common way to rot one.

Should you fertilise salvia yangii after repotting?

Not immediately. Wait about 3 weeks after repotting salvia yangii. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.