Repotting guide

When & how to repot Queen of Night Tulip (Tulipa gesneriana 'Queen of Night')

Also called Queen of Night Tulip, Black Tulip.

More about queen of night tulip

About Queen of Night Tulip

Tulipa gesneriana 'Queen of Night' · also called Queen of Night Tulip, Black Tulip · flowering

Tulipa 'Queen of Night' is an iconic late-season single late tulip bearing deep maroon-black, satiny flowers on tall 60 cm stems in mid-to-late spring. One of the darkest tulips available, it makes a dramatic statement in borders and cut-flower arrangements. Best treated as an annual in UK gardens; requires cold vernalisation for reliable bloom.

Mature size: 55–65 cm tall; flowers 6–8 cm across; spread 10–12 cm per bulb

Watch for — Botrytis tulipae (tulip fire): The most serious disease of garden tulips — causes scorched-looking, twisted shoots, brown-spotted petals, and grey mould. Destroy affected plants and soil immediately; do not compost. Avoid replanting tulips in the same spot for 3 years. Plant in well-ventilated positions.

How to tell queen of night tulip needs repotting

Repotting on a calendar is less reliable than reading the plant. For queen of night tulip, 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 queen of night tulip 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 queen of night tulip

Pot on seedlings as they grow; not a perennial repot. Queen of Night Tulipis grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Bulbous geophyte; upright single stems, non-branching; typically grown as an annual in UK cultivation.

What size pot to step queen of night tulip up to

Pot queen of night tulip 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 queen of night tulip

Pot queen of night tulip 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 queen of night tulip

Pot on before it is root-bound. Check queen of night tulip 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 fertile, well-drained loam; ph 6.0–7.0 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 queen of night tulip 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 queen of night tulip

Queen of Night Tulip wants fertile, well-drained loam; ph 6.0–7.0. Rich, loamy soil produces the best stem length and flower quality. Incorporate well-rotted garden compost at planting but maintain sharp drainage — waterlogging kills bulbs. In heavy clay, plant on a layer of coarse sand for drainage. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting queen of night tulip — frequently asked questions

How often should you repot queen of night tulip?

Pot on seedlings as they grow; not a perennial repot for queen of night tulip. Queen of Night Tulip is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into fertile, well-drained loam; ph 6.0–7.0 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 queen of night tulip need?

When is the best time of year to repot queen of night tulip?

Can you put queen of night tulip straight into a much bigger pot?

No. Even a fast-growing queen of night tulip 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 queen of night tulip after repotting?

Not immediately. Wait about 1 week after repotting queen of night tulip. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.