Light
Bright indirect • approx. 10,000–20,000 lux
Apocynaceae
Hoya undulata
Wax Plant
- Curated selection:
Every plant is hand‑picked for health and visual appeal, so you receive a strong, well‑established plant.
- Representative photos:
Product images show a typical plant of this variety. Natural differences in leaf number, shape or variegation are normal, your plant will still match in type and quality.
- Size details:
Listed sizes refer to pot diameter (cm) and approximate overall height (cm) from the base of the pot to the tallest leaf or stem.
- “Get What You See” items:
If you are buying the exact plant shown in the photos, this is clearly stated in the size section.
- Individual photos:
One‑off photos are only provided when this is explicitly mentioned in the size section. - For special traits or small quirks, please check the full product description.
VAT included · plus
Your new plant has just travelled a long way and needs a calm start in its new home. For step-by-step unboxing and first-week care, check our after-delivery care guide. For deeper tips on how your plant settles in over the next weeks, read our houseplant acclimatization guide.
- Care basics , Main hub with links to all houseplant care guides.
- After delivery & first week , Unpacking, first placement, and early recovery.
- Light, How much light houseplants really need indoors.
- Watering , When to water and how to avoid root rot.
- Substrates & roots, Potting mixes and drainage for strong root systems.
- Humidity, When humidity matters and what actually helps.
- Fertilizing, Simple feeding routine without burning roots.
- Problems & pests, Yellow leaves, brown tips, bugs, and fixes that work.
- Semi-hydro, How to run low-maintenance mineral substrates.
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28-day plant guarantee, if a plant arrives damaged or fails soon after delivery, we help you make it right.
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Care at a glance
Hoya undulata
Watering
Water when ~60–80% dry
Substrate
Airy + fast-draining • Light moisture buffer • Bark-based • Medium-chunky
Temperature
Ideal: 16–24 °C • Avoid below: 10 °C
Humidity
Moist 50–60 %
Growth habit
Climbing or trailing epiphytic perennial vine.
Support
recommended
Growth speed
Average
Max size indoors
Max. trail length: 100 cm • Max. spread: 50 cm
Toxicity & safety
Non-toxic
Origin & habitat
Native to Borneo
Outdoor growing
Outside from 15 °C · sheltered from wind and rain
How to read these values
These care values are quick reference points for indoor growing. Use them as a guide, then adjust for pot size, substrate, temperature and how quickly the substrate dries.
For more detail, read the full product description or visit our Plant Care Guides.
- Light: level and approximate lux at leaf level.
- Watering: “% dry” shows how far the substrate should dry before watering again.
- Substrate: structure, drainage, moisture retention, base material and particle size.
- Temperature: “Ideal” shows the preferred range; “Avoid below” marks the cold-stress threshold.
- Humidity: target range; steady conditions usually matter more than exact numbers.
- Growth habit: how the plant grows, such as upright, climbing, trailing, clumping or rosette-forming.
- Support: whether a stake, pole or trellis is needed, optional or unnecessary.
- Growth speed: expected pace under suitable indoor conditions; use as a guide, not a promise.
- Max size indoors: realistic long-term indoor size under good conditions.
- Toxicity & safety: irritation, toxicity or physical hazards such as spines or bristles.
- Origin & habitat: native range, hybrid background or typical habitat where relevant.
- Outdoor growing: when a potted indoor plant can be placed outside and what outdoor protection it needs.
Hoya undulata – Rare Wavy-Leaved Hoya with Ant-Friendly Adaptations
Hoya undulata S. Rahayu and Rodda (2015) is a visually striking epiphytic climber from the tropical forests of Kalimantan (Borneo), known for its wavy leaf edges and occasional formation of domatia – tiny structures that may house ants in nature. With leathery, sculptural foliage and slow, rewarding growth, this rare species thrives in bright, humid indoor spaces. It’s a must-have for collectors seeking unusual leaf structure and natural mutualism traits.
Key Features of Hoya undulata
- Wavy-Margined Leaves – Mature leaves reach 7 – 15 cm, with undulated edges, leathery texture, fine surface veining, and a subtle semi-gloss finish.
- Ant Domatia – Some leaf bases form pockets that may serve as ant shelters in wild settings – one of few Hoyas with this trait.
- Variable Growth Habit – Grows as a slender vine or stays compact depending on support, light, and humidity.
Botanical Context and Native Habitat
- Origin – Native to lowland rainforests in Kalimantan, Borneo.
- Growth Form – Epiphytic, with aerial roots and twining stems that benefit from vertical support.
- Formal Description – Described in 2015 by S. Rahayu and Rodda (Garden Bulletin Singapore).
Indoor Growing Conditions for Hoya undulata
- Light – Requires bright, indirect light. Tolerates filtered morning sun or strong artificial grow lights.
- Temperature – Optimal range is 22 – 30 °C. Avoid exposure below 15 °C.
- Humidity – Thrives above 75%. Essential for leaf health and rooting success.
- Watering – Let the top 2 – 3 cm of substrate dry before watering again. Never allow roots to sit in soggy conditions.
- Substrate – Use 40% orchid bark, 30% perlite or pumice, and 30% sphagnum or coco chips for excellent aeration.
- Feeding – Apply a balanced liquid fertilizer every 4 – 6 weeks. A bloom-boosting feed (higher potassium) can be used occasionally.
Potting, Support, and Growth Behavior
- Pot Choice – Use a shallow, breathable pot with drainage holes. Terra cotta works well for airflow.
- Support – Provide a moss pole, trellis, or stake to guide vines vertically and encourage fuller growth.
- Growth Speed – Moderate grower; expect 5 – 10 cm/month under ideal indoor conditions.
- Repotting – Only when root-bound. This Hoya dislikes frequent disturbance.
Propagation and Semi-Hydro Tips
- Propagation – Take stem cuttings with at least one node. Root in moist sphagnum, perlite, or LECA under 25 – 28 °C and 80%+ humidity.
- Rooting Time – Cuttings typically root in 4 – 6 weeks with consistent warmth and airflow.
- Semi-Hydroponics – Can adapt to LECA if transitioned gradually. Keep humidity high and flush regularly to avoid salt buildup.
Flowering Behavior and Peduncle Notes
Though flowering is uncommon indoors, Hoya undulata may produce pale pink to off-white, star-shaped blooms with a slightly fuzzy texture in small umbels. These appear on long-lived peduncles – never remove them, as future blooms often return to the same point.
Common Problems and How to Fix Them
- Yellowing Leaves – Often from overwatering or compacted substrate. Improve drainage and reduce frequency.
- Browning Leaf Tips – Usually caused by low humidity or mineral-heavy tap water. Use distilled or rainwater.
- Leaf Drop – Can occur from inconsistent watering or environmental shocks. Keep light, moisture, and airflow stable.
- Fungal Spots – Improve airflow and reduce moisture on leaves. Use a gentle fungicide if necessary.
- Pests – Mealybugs, spider mites, scale, and thrips may appear. Treat with neem oil or insecticidal soap early.
Etymology and Naming
The species name undulata comes from Latin, meaning “wavy,” a reference to its distinctive leaf margins. The genus Hoya honors 18th-century British botanist Thomas Hoy.
Order Hoya undulata Today
Bring a rare, sculptural species into your collection. Order Hoya undulata now to enjoy its wavy foliage, ant-adaptive traits, and exotic appeal – perfect for Hoya enthusiasts and rare plant lovers alike.
Plant names, growth habits, natural habitats and indoor care guidance are checked against trusted botanical, habitat and horticultural references before publication.View our plant care resources and references.
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Hoya undulata
Sale price€65,00
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