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Notebook · Guide 8 October 2026 · houseplants

Getting a hoya to flower: leave the spurs alone

Hoyas flower in bright light, when mature and slightly pot-bound, and rebloom from the same short spurs. Don't cut those off, and don't move the plant once it's in bud.

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A hoya that won't flower is usually missing one of three things: light, age or a snug pot. Or someone has tidied off the little leafless stubs where the last flowers were. Those stubs are where the next flowers come from. Get the light right, leave the stubs, and be patient. A healthy hoya will flower.

01At a glance

  • Light first: the brightest window you have, out of hot midday sun.
  • Keep the stubs: the short spurs left after flowering bloom again. Never cut them off.
  • Snug pot: hoyas flower best slightly pot-bound. Move up only one pot size, and only when you must.
  • Don't move it in bud: a change in light can make it drop its buds.
  • Be patient: Iowa State University Extension says hoyas often take several years to reach flowering age.

02Light: the main switch

The RHS says flowering depends on plenty of light. Iowa State University Extension puts it plainly: low light "generally leads to thin, stretched growth and little or no flowering." Its advice is one of your brightest windows, out of direct sun. The RHS adds that the leaves scorch in hot summer sun, so give it gentle morning or late-afternoon sun if you can, and shade from the midday blast.

If your hoya has long bare stems with small, widely spaced leaves, it is reaching for light. Move it closer to the window before you change anything else.

03The spurs: the stubs you must not cut

Hoya flowers grow in clusters on short, stubby stalks called spurs (botanically, peduncles). When the flowers fade, the stalk stays. Leave it. The RHS says that "if the flower stalks are left in place, more blooms will often sprout from the stumps of previous clusters." Iowa State is firmer: let spent flowers fall off naturally and never cut them off, because you are removing future flower sites.

So:

  1. Let the faded flowers drop by themselves.
  2. Leave the bare stalk on the stem, even though it looks like dead wood.
  3. Watch it next season. New buds often form on the end of the same spur.
  4. If you prune, do it lightly in late winter or early spring, as the RHS advises, and keep clear of the spurs. The RHS notes hoyas don't respond well to hard pruning. Wear gloves: the RHS says the milky sap can irritate skin.

04Pot, water and feed

  • Pot: Iowa State says hoyas bloom best when slightly pot-bound. The RHS says a plant can stay in the same pot for several years, until roots fill it. When you do repot, in spring, go only a few centimetres bigger. An oversized pot holds water and invites root rot.
  • Water: soak, drain, then let the compost dry well before watering again. In winter, the RHS says to let it get fairly dry but never let it dry out completely. Cold, wet compost rots the roots.
  • Feed: lightly, in spring and summer. Iowa State suggests a general feed at half or quarter strength. The RHS warns that overfeeding builds up salts in the compost, so flush the pot through with plain water every few months. Don't feed for five to six weeks after repotting.
  • Warmth: the RHS gives 16–24°C in the growing season and a winter minimum of 10°C for Hoya carnosa. Iowa State says some hoyas benefit from a slight drop in temperature at night, so a room that cools a little at night is fine.

05Once it's in bud

This is where people lose flowers they've waited years for. The RHS advises never moving a hoya once buds have formed, as they may drop if the light changes. It also lists compost that is too wet or too dry as a cause of bud drop. Iowa State calls this "bud blast".

  • Don't turn the pot to admire it, or move it for a party.
  • Keep watering steady. Don't let the compost go bone dry, and don't drown it.
  • Expect scent at night. The RHS describes the flowers as highly scented, especially in the evening.

06Why isn't my hoya flowering?

  • Long gaps between leaves, pale growth: too little light.
  • Lush leaves, no buds, big pot: over-potted. Wait it out, and don't repot again.
  • Flowered once, never again: check whether someone cut off the spurs.
  • Buds formed, then fell: it was moved, or the watering swung between wet and dry.
  • Young plant from a cutting: it may simply not be old enough yet.
Save your money
A "bloom booster". Light is the trigger. Moving the plant costs nothing.
A bigger pot. It delays flowering.
A new plant because the old one "won't flower". Give it a summer in a brighter window first.
Strong feed. Weak and occasional is what the sources recommend. Overfeeding causes salt build-up.

How we checked this

Every care and safety claim on this page is verified against horticultural and veterinary sources.

Sources: RHS — How to grow hoya · Iowa State University Extension — All about hoyas

Checked 8 October 2026. If our advice ever conflicts with the RHS, believe them and tell us.