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Lonicera periclymenum 'Serotina' (late Dutch honeysuckle) care

Lonicera periclymenum 'Serotina'

Also called late Dutch honeysuckle, late flowering woodbine.

RHS H6USDA 4-9Mildly toxic to petsIndoor Typically 4-7 m with suitable support

Watering rhythm

5-10days

When the top 3-4 cm of soil dries, roughly every 5-10 days while establishing

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Light

Bright indirect light (just back from a sunny window)

Soil

Moist, humus-rich, well-drained soil

Humidity

Outdoor ambient

Temp

-20 to 28°C

Pet safety

Mildly toxic to pets

Mature size

Typically 4-7 m with suitable support

Care at a glance

Light

Bright but filtered. Lonicera periclymenum 'Serotina' burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Best with the flowering top in sun to light dappled shade and the roots kept cool and shaded. Tolerates partial shade, but heavy shade thins flowering and encourages mildew. If you only have a south window, set the plant back 1.5 m or hang a sheer curtain — both knock the intensity down into the right range.

Watering

Watering lonicera periclymenum 'serotina': when the top 3-4 cm of soil dries, roughly every 5-10 days while establishing. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Keep evenly moist, especially while young and in dry spells, as it dislikes drought at the roots. A generous mulch keeps the root run cool and damp, exactly as this hedgerow-derived cultivar prefers.

Soil and pot

Lonicera periclymenum 'Serotina' grows best in moist, humus-rich, well-drained soil. Thrives in most fertile garden soils, including clay and chalk, with reasonable drainage. A leafy, moisture-retentive soil that stays cool at the roots gives the strongest growth and longest flowering. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Lonicera periclymenum 'Serotina' sits happiest at around Outdoor ambient humidity and -20 to 28°C (-4 to 82°F). A hardy outdoor climber needing no special humidity; ordinary garden conditions suit it. Good spacing and airflow reduce powdery mildew, which is the cultivar's main foliage weakness. If you keep the room above year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed lonicera periclymenum 'serotina' sparingly. Feed lightly in spring with a balanced fertiliser and mulch annually with well-rotted organic matter to keep roots cool and fed. Avoid high-nitrogen feeds that produce soft, mildew-prone growth. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on lonicera periclymenum 'serotina' in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Powdery mildew — Frequent on dry-rooted, congested plants; keep roots cool and moist, improve air circulation and remove affected foliage.
  • Aphids — Cluster on tender shoots and buds, causing distortion and honeydew; wash off or treat promptly and encourage predators.
  • Dry-root stress — Hot, dry roots trigger wilting and poor bloom; mulch deeply and water reliably in dry weather.
  • Bare lower stems — Flowers concentrate at the top as the plant ages; renovate by pruning overgrown stems after flowering to restore lower growth.

Propagation

Increase by semi-ripe cuttings in summer or hardwood cuttings in autumn, and by layering. As a named cultivar it must be propagated vegetatively to stay true; seed will not reproduce 'Serotina' reliably. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Lonicera periclymenum 'Serotina' is mildly toxic to pets. As a Lonicera periclymenum cultivar, it shares the genus's status: not listed as non-toxic by the ASPCA, with berries and foliage containing saponins and cyanogenic compounds that can cause gastrointestinal upset. Treat as mildly toxic, keep pets away from the colourful berries, and verify with a vet if any is eaten. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Lonicera periclymenum 'Serotina' care — frequently asked questions

What is the common name for Lonicera periclymenum 'Serotina'?

Lonicera periclymenum 'Serotina' is most commonly called Lonicera periclymenum 'Serotina', but it is also known as late Dutch honeysuckle, late flowering woodbine. The names refer to the same species, so care instructions for Lonicera periclymenum 'Serotina' apply identically to anything sold as late Dutch honeysuckle.

How much light does lonicera periclymenum 'serotina' need?

Lonicera periclymenum 'Serotina' grows best in bright indirect light (just back from a sunny window). Best with the flowering top in sun to light dappled shade and the roots kept cool and shaded. Tolerates partial shade, but heavy shade thins flowering and encourages mildew.

How often should I water lonicera periclymenum 'serotina'?

Water lonicera periclymenum 'serotina' when the top 3-4 cm of soil dries, roughly every 5-10 days while establishing. Keep evenly moist, especially while young and in dry spells, as it dislikes drought at the roots. A generous mulch keeps the root run cool and damp, exactly as this hedgerow-derived cultivar prefers. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is lonicera periclymenum 'serotina' toxic to cats and dogs?

Lonicera periclymenum 'Serotina' is mildly toxic to pets. As a Lonicera periclymenum cultivar, it shares the genus's status: not listed as non-toxic by the ASPCA, with berries and foliage containing saponins and cyanogenic compounds that can cause gastrointestinal upset. Treat as mildly toxic, keep pets away from the colourful berries, and verify with a vet if any is eaten.

What USDA hardiness zone does lonicera periclymenum 'serotina' grow in?

Lonicera periclymenum 'Serotina' is rated for USDA zone 4-9 and RHS hardiness H6. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Lonicera periclymenum 'Serotina' deep-dive guides

Every aspect of lonicera periclymenum 'serotina' care, each with its own calibrated guide:

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Lonicera periclymenum 'Serotina' qualifies for 6 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Lonicera periclymenum 'Serotina' is also commonly called late Dutch honeysuckle or late flowering woodbine.