Repotting guide

When & how to repot Scaevola aemula 'Bombay Dark Blue' (Scaevola aemula 'Bombay Dark Blue')

Also called Bombay Dark Blue Fan Flower, Dark Blue Scaevola.

More about scaevola aemula 'bombay dark blue'

About Scaevola aemula 'Bombay Dark Blue'

Scaevola aemula 'Bombay Dark Blue' · also called Bombay Dark Blue Fan Flower, Dark Blue Scaevola · flowering

'Bombay Dark Blue' is a compact fan flower bred for masses of fan-shaped, deep blue-purple blooms on a tidy, well-branched habit. This Australian-native warm-season annual is heat- and drought-tolerant, blooms tirelessly without deadheading, and is a favourite for containers, baskets and edging where it draws bees through summer into autumn.

Mature size: 20-30 cm tall and 30-50 cm spread

Watch for — Root rot from overwatering: Soggy soil quickly rots the roots; plant in sharply drained mix and let the surface dry between waterings.

How to tell scaevola aemula 'bombay dark blue' needs repotting

Repotting on a calendar is less reliable than reading the plant. For scaevola aemula 'bombay dark blue', 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 scaevola aemula 'bombay dark blue' 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 scaevola aemula 'bombay dark blue'

Pot on seedlings as they grow; not a perennial repot. Scaevola aemula 'Bombay Dark Blue'is grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Compact, mounding to spreading warm-season annual with well-branched trailing stems studded with one-sided fan-shaped flowers, ideal for the edges of containers, baskets and as a low groundcover..

What size pot to step scaevola aemula 'bombay dark blue' up to

Pot scaevola aemula 'bombay dark blue' 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 scaevola aemula 'bombay dark blue'

Pot scaevola aemula 'bombay dark blue' 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 scaevola aemula 'bombay dark blue'

Pot on before it is root-bound. Check scaevola aemula 'bombay dark blue' 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 light, free-draining soil or potting mix 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 scaevola aemula 'bombay dark blue' 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 scaevola aemula 'bombay dark blue'

Scaevola aemula 'Bombay Dark Blue' wants light, free-draining soil or potting mix. Needs sharp drainage; grows in average to poor soil of pH 5.5-6.5 and tolerates sandy ground. Heavy, wet soil causes root rot. In pots use a free-draining peat-free mix; it dislikes overly rich, waterlogged media. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting scaevola aemula 'bombay dark blue' — frequently asked questions

How often should you repot scaevola aemula 'bombay dark blue'?

Pot on seedlings as they grow; not a perennial repot for scaevola aemula 'bombay dark blue'. Scaevola aemula 'Bombay Dark Blue' is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into light, free-draining soil or potting mix 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 scaevola aemula 'bombay dark blue' need?

When is the best time of year to repot scaevola aemula 'bombay dark blue'?

Can you put scaevola aemula 'bombay dark blue' straight into a much bigger pot?

No. Even a fast-growing scaevola aemula 'bombay dark blue' 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 scaevola aemula 'bombay dark blue' after repotting?

Not immediately. Wait about 1 week after repotting scaevola aemula 'bombay dark blue'. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.