Repotting guide

When & how to repot Flanagan's Sage (Salvia flanaganii)

Also called Flanagan's sage.

More about flanagan's sage

About Flanagan's Sage

Salvia flanaganii · also called Flanagan's sage · flowering

Salvia flanaganii is a little-known South African sage from the Eastern Cape and KwaZulu-Natal grasslands, where it grows as a low, spreading perennial with aromatic grey-green foliage and spikes of pale blue to lilac flowers in summer. It is adapted to hot, dry summers with good rainfall in winter-dormant periods, and tolerates moderate frosts in a well-drained, sunny position. Plant in full sun with gritty, sharply draining soil to replicate its grassland habitat. Salvia is listed by the ASPCA as non-toxic to cats and dogs.

Mature size: 30-50 cm tall and 40-60 cm wide in a well-drained, sunny border.

How to tell flanagan's sage needs repotting

Repotting on a calendar is less reliable than reading the plant. For flanagan's sage, 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 flanagan's sage

Every 2–3 years, into bone-dry mix. Flanagan's Sage's growth habit — low-growing, spreading herbaceous or semi-evergreen perennial forming a loose mound of aromatic grey-green leaves with upright flower stems. — sets the pace. Salvia flanaganii is a little-known South African sage from the Eastern Cape and KwaZulu-Natal grasslands, where it grows as a low, spreading perennial with aromatic grey-green foliage and spikes of pale blue to lilac flowers in summer. It is adapted to hot, dry summers with good rainfall in winter-dormant periods, and tolerates moderate frosts in a well-drained, sunny position. Plant in full sun with gritty, sharply draining soil to replicate its grassland habitat. Salvia is listed by the ASPCA as non-toxic to cats and dogs.

What size pot to step flanagan's sage up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Flanagan's Sage 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 flanagan's sage

Spring or summer, while flanagan's sage 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 flanagan's sage

Repot dry. Do not water flanagan's sage 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 gritty, sharply drained sandy loam or loam 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 flanagan's sage 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 flanagan's sage 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 flanagan's sage

Flanagan's Sage wants gritty, sharply drained sandy loam or loam. Thrives in lean, stony or sandy soils similar to the free-draining, low-nutrient grassland soils of its native habitat. Incorporate generous amounts of coarse grit into the planting hole; avoid rich, moisture-retentive compost or clay. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting flanagan's sage — frequently asked questions

How often should you repot flanagan's sage?

Every 2–3 years, into bone-dry mix for flanagan's sage. Repot flanagan's sage every 2–3 years into a snug pot of gritty, sharply drained sandy loam or loam, 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 flanagan's sage need?

When is the best time of year to repot flanagan's sage?

Should you water flanagan's sage after repotting?

No — not straight away. Repot flanagan's sage 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 flanagan's sage after repotting?

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