There is no other flower quite this colour. The jade vine, Strongylodon macrobotrys, produces cascading chains of claw-shaped blooms in a luminous blue-green that looks, frankly, artificial — and it is one of the very few genuinely turquoise flowers in the plant kingdom. It is also a Philippine rainforest climber that is endangered in the wild, needs real warmth, and will keep you waiting the better part of a decade for its first raceme. If you have a heated greenhouse or a warm conservatory and a stubborn streak, growing one from seed is among the most rewarding projects in horticulture. This guide covers what the plant actually needs, how to sow it, and what to expect honestly at each stage.
- Botanical name Strongylodon macrobotrys, family Fabaceae
- Sowing soak 24–48 hours, sow at 25–30°C, keep humid
- Minimum temperature 15°C — it will not survive a British winter outdoors
- First flowers typically 5–8 years from seed, on racemes up to 90 cm
What the jade vine actually is
Despite the tropical drama, Strongylodon macrobotrys is a legume — a close relative of runner beans and sweet peas. It is a woody evergreen climber from the humid ravine forests of the Philippines, where it scrambles 15–18 metres into the canopy and then drops its flowers back down into the open air beneath. The pendulous racemes can carry more than seventy blooms and hang up to a metre; the individual flowers are hooked, waxy and claw-like, which is where the alternative name "emerald creeper" comes from.
The colour is worth understanding, because it explains a lot about the plant. That turquoise is not a single pigment. It comes from a co-pigmentation effect — a blue anthocyanin sitting alongside a colourless flavone at a specific cell pH — and it exists to catch the eye of bats, which are the vine's natural pollinators. The flowers glow faintly at dusk and hang clear of the foliage precisely so a bat can hover beneath them. That detail matters indoors: without bats, or a paintbrush, your vine will flower beautifully and never set a pod.
Can you really grow it from seed?
Yes, but two things decide whether you succeed, and neither of them is skill. The first is seed freshness. Jade vine seed is recalcitrant — it does not tolerate drying and cold storage the way most garden seed does, and viability falls away quickly once the pods are opened. Sow it the week it arrives. Do not save half the packet for next spring; that half will almost certainly be dead. Our guide to seed viability and germination testing explains why some species behave this way while a bean can sit in a tin for five years.
The second is heat. This is not "warm windowsill" heat. Jade vine seed wants a steady 25–30°C with high humidity, and germination often takes three to eight weeks even when everything is right. A heated propagator with a lid is close to essential. If you have not used one before, our indoor seed starting guide covers the basics of bottom heat and covered propagation.
How to sow jade vine seed
- Soak the seed for 24–48 hours Use hand-warm water and change it once. Like most legume seed, jade vine has a hard coat; the seed should visibly swell. Any that stay hard after two days can be nicked very carefully on the edge away from the pale scar.
- Sow one seed per 9 cm pot Use a free-draining mix — peat-free compost with about a third added perlite or fine bark. Bury the seed on its side roughly 2 cm deep. Individual pots avoid disturbing the taproot later.
- Hold 25–30°C with a lid on Bottom heat plus a propagator lid gives the warmth and humidity together. Steady temperature beats high temperature — see how to germinate seeds for why fluctuation stalls germination.
- Wait — and keep waiting Three to eight weeks is normal, and a batch rarely comes up together. Keep the compost damp but never sodden; cold, wet compost is the fastest route to damping off.
- Grow on in bright, filtered light Seedlings scorch in direct midday glass but stretch badly in gloom. Light shade under glass is the sweet spot; if stems run thin and pale, read our notes on leggy seedlings.
- Pot on before the roots circle Move up one size at a time, ending in a very large container or, better, a prepared border bed inside the greenhouse. Give it something to climb from the start.
Growing on: heat, humidity and something to hang from
Once established, a jade vine is less fragile than its reputation suggests — provided it never gets cold. Keep the minimum above 15°C, ideally 18°C, with humidity over 60%. Feed generously through spring and summer with a balanced liquid feed, easing off nitrogen as the plant matures so it puts energy into flowering rather than leaf; our feeding guide covers the principle. Water freely in growth and much more sparingly in winter, when growth slows almost to a stop.
The support is the part people underestimate. Racemes hang, so the vine needs to be trained along something overhead — a pergola, roof wires, a strong horizontal frame — with clear air beneath it. A jade vine trained flat against a wall will flower into the brickwork and you will never see it properly. Our guide to plant supports and trellising covers the load-bearing side; assume the mature plant is heavy.
Greenhouse border or big container?
Planted in a border
A prepared bed inside a heated greenhouse or conservatory.
- Unrestricted roots — far faster to flowering size
- Much steadier moisture and root temperature
- Permanent: you cannot move it once it is away
Grown in a container
A very large pot — 60 litres upwards — on a stand or castors.
- Can be moved into the warmest spot for winter
- Needs watching daily in summer heat
- Restricted roots usually delay flowering further
If you go the container route, everything in our container growing guide applies, only more so: a pot is a closed system, and a plant this vigorous will empty it fast. For a border, prepare properly before planting — see preparing your soil, and consider building the bed up for drainage as described in our guide to raised bed gardening.
Common mistakes
- Storing the seed — the single biggest cause of failure. Jade vine seed does not keep. Sow on arrival.
- Treating it as a houseplant — a living room is too dry and, in winter, too cool. It belongs under glass. Browse our houseplant seed range if you want something that genuinely thrives indoors.
- Training it up a wall — the flowers hang. Without open air beneath the stems you lose the entire effect.
- Expecting flowers in year two — five to eight years from seed is normal, and a plant kept in a small pot may take longer still. Patience is the main input.
- Overwatering in winter — cold, wet roots kill more jade vines than frost does. Cut watering right back when growth stops; see watering, how and how much.
- Ignoring red spider mite — dry greenhouse air is its favourite habitat, and this vine is a magnet. Keep humidity up and check leaf undersides weekly, as in our garden pests guide.
Frequently asked questions
How long does jade vine take to flower from seed?
Usually five to eight years, occasionally sooner in a heated border with unrestricted roots. Plants grown in containers frequently take longer. There is no reliable shortcut — good heat, good light and root room are the only levers you have.
Can I grow jade vine outdoors in the UK?
Not year-round. It has no frost tolerance and needs a 15°C minimum, so it is a heated greenhouse or conservatory plant in northern Europe. A large pot can spend high summer outside in a sheltered, warm spot, but it must come back in well before nights cool — the principles of hardening off apply in reverse.
Why won't my jade vine seed germinate?
Nine times out of ten it is old seed or insufficient heat. Below about 22°C germination is very slow and unreliable. Check the batch date, soak thoroughly, and hold the propagator steady at 25–30°C. Our germination troubleshooting guide covers the rest.
Will it set seed pods indoors?
Only with help. The flowers are bat-pollinated in the wild, so under glass you will need to hand-pollinate with a soft brush, moving pollen between flowers. If you do get pods, sow the seed fresh rather than storing it — our seed saving guide explains the difference between seed that keeps and seed that does not.
Jade vine is not a beginner's plant, and pretending otherwise does nobody any favours — but nothing else looks like it, and a seedling started this autumn under warm glass is a decade-long project worth beginning. If you want other climbers while you wait, the thunbergia, ipomoea, cobaea and passiflora ranges all climb fast from a spring sowing. Browse the Strongylodon macrobotrys collection, the wider flower seed range and our blue flowers, then work through the rest of our growing guides. Start it warm, start it fresh, and give it something to hang from.
