Repotting guide

When & how to repot Nepeta racemosa 'Blue Wonder' (Nepeta racemosa 'Blue Wonder')

Also called Blue Wonder catmint.

More about nepeta racemosa 'blue wonder'

About Nepeta racemosa 'Blue Wonder'

Nepeta racemosa 'Blue Wonder' · also called Blue Wonder catmint · flowering

A compact, low-growing catmint forming neat mounds of aromatic grey-green leaves topped with deep lavender-blue flower spikes from late spring into summer. 'Blue Wonder' is tidier and smaller than 'Walker's Low', making it ideal for edging, paths, and the front of borders. Drought-tolerant, deer-resistant, and bee-friendly, it reblooms well after a midseason shear.

Mature size: About 30-40 cm tall and 45-50 cm wide.

Watch for — Loss of compactness: Flops or opens up in rich soil or shade; grow lean and sunny and shear after the first flush to restore the mound.

How to tell nepeta racemosa 'blue wonder' needs repotting

Repotting on a calendar is less reliable than reading the plant. For nepeta racemosa 'blue wonder', 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 nepeta racemosa 'blue wonder'

Every 2–3 years, into bone-dry mix. Nepeta racemosa 'Blue Wonder''s growth habit — compact, low, dense mound-forming aromatic perennial, spreading modestly to make a neat carpet of foliage and flowers. — sets the pace. A compact, low-growing catmint forming neat mounds of aromatic grey-green leaves topped with deep lavender-blue flower spikes from late spring into summer. 'Blue Wonder' is tidier and smaller than 'Walker's Low', making it ideal for edging, paths, and the front of borders. Drought-tolerant, deer-resistant, and bee-friendly, it reblooms well after a midseason shear.

What size pot to step nepeta racemosa 'blue wonder' up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Nepeta racemosa 'Blue Wonder' 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 nepeta racemosa 'blue wonder'

Spring or summer, while nepeta racemosa 'blue wonder' 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 nepeta racemosa 'blue wonder'

Repot dry. Do not water nepeta racemosa 'blue wonder' 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 well-drained, lean to average 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 nepeta racemosa 'blue wonder' 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 nepeta racemosa 'blue wonder' 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 nepeta racemosa 'blue wonder'

Nepeta racemosa 'Blue Wonder' wants well-drained, lean to average soil. Thrives in free-draining, neutral to alkaline soil and tolerates poor, gritty ground. Avoid rich or wet soils, which cause floppy growth and crown rot. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting nepeta racemosa 'blue wonder' — frequently asked questions

How often should you repot nepeta racemosa 'blue wonder'?

Every 2–3 years, into bone-dry mix for nepeta racemosa 'blue wonder'. Repot nepeta racemosa 'blue wonder' every 2–3 years into a snug pot of well-drained, lean to average 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 nepeta racemosa 'blue wonder' need?

When is the best time of year to repot nepeta racemosa 'blue wonder'?

Should you water nepeta racemosa 'blue wonder' after repotting?

No — not straight away. Repot nepeta racemosa 'blue wonder' 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 nepeta racemosa 'blue wonder' after repotting?

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