Repotting guide

When & how to repot Ipomoea nil 'Scarlett O'Hara' (Ipomoea nil 'Scarlett O'Hara')

Also called Scarlett O'Hara morning glory.

More about ipomoea nil 'scarlett o'hara'

About Ipomoea nil 'Scarlett O'Hara'

Ipomoea nil 'Scarlett O'Hara' · also called Scarlett O'Hara morning glory · flowering

'Scarlett O'Hara' is an award-winning Japanese morning glory (Ipomoea nil) cultivar with large, rich rosy-red to wine-crimson trumpet flowers and a paler throat, opening each morning through summer and autumn. A vigorous annual twiner grown easily from seed, it clothes trellises and arches quickly and flowers freely until cut down by the first frost.

Mature size: 2.5-4 m of vining growth in a single season.

How to tell ipomoea nil 'scarlett o'hara' needs repotting

Repotting on a calendar is less reliable than reading the plant. For ipomoea nil 'scarlett o'hara', watch for these signs:

Roots circling the bottom of the module or pot, or poking out of the drainage holes.
The seedling dries out within a day and growth has visibly stalled.
Roots are white and matted in a tight spiral when you tip the plant out.
It has outgrown its current container for the stage of the season — pot ipomoea nil 'scarlett o'hara' on before it becomes hard root-bound.

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 ipomoea nil 'scarlett o'hara'

Pot on seedlings as they grow; not a perennial repot. Ipomoea nil 'Scarlett O'Hara'is grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Vigorous annual climber twining around supports; quick to cover trellis and netting, flowering from mid-summer until frost..

What size pot to step ipomoea nil 'scarlett o'hara' up to

Pot ipomoea nil 'scarlett o'hara' on gradually — a seedling jumped straight into a huge pot sits in cold, wet, airless soil and stalls. Step up one or two sizes at a time as the roots fill each container, finishing in a large final pot or the ground. The aim is roots that never circle and never check.

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 ipomoea nil 'scarlett o'hara'

Pot ipomoea nil 'scarlett o'hara' on through the active growing season, whenever roots fill the current container — there is no single date, just "before it becomes root-bound". Avoid potting on during a cold snap.

Step-by-step: repotting ipomoea nil 'scarlett o'hara'

Pot on before it is root-bound. Check ipomoea nil 'scarlett o'hara' regularly; move it up as soon as roots reach the edge of the cell or pot, not after they have circled.
Step up one or two sizes. Choose the next container up — not a giant one. Cold, wet, unused soil around a small root system stalls seedlings.
Knock it out gently. Support the stem, tip the pot, and ease the rootball out without breaking it. A little teasing of circled roots at the base is fine.
Pot into rich mix. Set it into fresh average, well-drained soil at the same depth (tomatoes are the exception — they can go deeper to root along the stem).
Water in and grow on. Water well, keep it in good light, and resume feeding once it is established and growing again.

Aftercare

Water ipomoea nil 'scarlett o'hara' in well and keep it in bright light; a freshly potted-on seedling can wilt for a day while roots settle, so do not overcompensate by drowning it. Do not fertilise for about 1 week — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for ipomoea nil 'scarlett o'hara'

Ipomoea nil 'Scarlett O'Hara' wants average, well-drained soil. Moderately fertile, free-draining soil is ideal; overly rich ground delays flowering. Neutral to slightly acidic pH suits it. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting ipomoea nil 'scarlett o'hara' — frequently asked questions

How often should you repot ipomoea nil 'scarlett o'hara'?

Pot on seedlings as they grow; not a perennial repot for ipomoea nil 'scarlett o'hara'. Ipomoea nil 'Scarlett O'Hara' is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into average, well-drained soil so the roots never circle the cell, ending in a large final container. A root-bound transplant stalls and never fully recovers.

What size pot does ipomoea nil 'scarlett o'hara' need?

When is the best time of year to repot ipomoea nil 'scarlett o'hara'?

Can you put ipomoea nil 'scarlett o'hara' straight into a much bigger pot?

No. Even a fast-growing ipomoea nil 'scarlett o'hara' should only go up one pot size at a time. A vastly oversized pot holds a reservoir of wet soil the roots cannot reach, which stays cold and soggy and rots the roots — the opposite of what you wanted.

Should you fertilise ipomoea nil 'scarlett o'hara' after repotting?

Not immediately. Wait about 1 week after repotting ipomoea nil 'scarlett o'hara'. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.