How to establish from seed
Sow Physalis alkekengi var. franchetii seeds indoors before the last frost in trays of well-drained, moderately fertile mix, placing them in full sun to light shade as seedlings develop. Cover very lightly and keep evenly moist—never waterlogged. Transplant outside once frost has passed into a site with the same conditions, allowing space for this medium-height plant to spread; use root barriers or choose containers if containment is important. Alternatively, direct sow outdoors after the last frost; in mild climates, autumn sowing may be possible when soil is workable. Plants spread by underground stems and can self-seed. All parts may be harmful if ingested; site and handle responsibly around children and pets.
- Full sun to light shade; well-drained, moderately fertile soil; avoid waterlogging.
- Start indoors before last frost; transplant after frost, or direct sow after last frost; autumn sowing in mild climates.
- Cover seeds lightly; keep evenly moist and warm until germination.
- Allow room to spread; use root barriers or edging to contain rhizomes.
- Suitable for containers; growth is easier to manage in pots.
- Grown for decorative, lantern-like calyces that provide seasonal interest.
How do I grow Physalis alkekengi from seed, and when should I sow Chinese lantern seeds?
Sow indoors before the last frost, or outdoors after the last frost when soil is workable; in mild climates, autumn sowing may be possible. Press seeds onto the surface and lightly cover, keeping them at a steady, warm temperature with gentle, even moisture until germination. Transplant seedlings once frosts have passed, handling roots carefully and planting at the same depth as in trays. Harden off over 7–10 days. Keep young plants evenly moist, then reduce watering as they establish. This hardy perennial dies back in winter and re-sprouts in spring, producing lanterns later in the season from midsummer onward.
What are the sun requirements for Physalis alkekengi, and what soil suits it best?
Chinese lanterns grow best in full sun to light shade; in hotter sites, a touch of afternoon shade can help prevent stress. They prefer well‑drained, moderately fertile soil and dislike waterlogged conditions, so improve drainage on heavy ground with organic matter or grit. Aim for consistent moisture during establishment, then water during prolonged dry spells, allowing the top layer of soil to dry slightly between waterings. They are adaptable to a range of garden soils, but overly rich conditions can lead to lush foliage at the expense of lantern display. Mulch helps retain moisture and suppress unwanted spread.
Is Physalis alkekengi invasive, and how can I control its spread?
Physalis alkekengi spreads via rhizomes and can become aggressive in favorable conditions, as well as self‑seeding if lanterns are left to shatter. To control it, confine roots with a buried barrier or grow in large containers. Deadhead or cut stems before seeds disperse to limit volunteers. In borders, lift and remove stray rhizomes in late winter or early spring while plants are dormant. A defined planting area, regular edging, and mulching make containment easier. Avoid cultivating through the patch during the growing season, which can fragment and distribute roots. Dispose of rhizome pieces and spent lanterns with care.
What spacing should I use for Chinese lantern plants, and how tall do they grow?
Space plants about 30–45 cm apart in the row, allowing additional room for natural outward spread over time. Mature plants typically reach 45–90 cm tall, depending on site and soil, with a similar spread if not contained. In exposed or very fertile conditions, stems may benefit from discreet support to prevent flopping when lanterns are heavy. Plan their placement so they do not crowd slower‑growing neighbors, and consider root barriers at planting if you want to maintain a tight clump. Regular thinning of outer shoots helps keep the planting dense and within bounds.
Can I grow Chinese lanterns in containers?
Yes. Container growing is an effective way to enjoy the lanterns while limiting spread. Choose a pot at least 30–40 cm wide with good drainage and use a well‑drained, peat‑free potting mix. Water more frequently than in ground, keeping the compost evenly moist but not saturated; allow the top couple of centimeters to dry slightly between waterings. Feed lightly in spring with a balanced, slow‑release fertilizer. Refresh or divide the plant every 1–2 years to prevent root binding. In regions with severe winter freezes, insulate the container or move it to a sheltered spot to protect roots.
How do I dry Chinese lantern stems for decoration?
Harvest stems when the husks are fully colored and firm, ideally after morning dew has evaporated. Strip off leaves to reduce moisture and hang small bunches upside down in a dark, dry, well‑ventilated space until crisp, usually 1–3 weeks. Keep bunches loose to avoid molding, and avoid direct sun, which can fade color. Once dry, handle gently and store in a cool, dry place. For the cleanest look, remove any immature or damaged lanterns before drying. Note that plant parts can be toxic if ingested, so keep dried arrangements away from pets and children.
This guidance summarises common cultivation practices and is intended for general conditions. Results may vary with microclimate, soil structure, drainage, and seasonal weather. Timing refers to cues such as after last frost or when soil is workable; in mild climates, autumn sowing may be possible. Individual product pages provide precise requirements, including spacing, depth, and timing, offering specific instructions for each variety.
Growing notes and climate-wise timing
Physalis alkekengi var. franchetii seeds can be started under cover 6–8 weeks before the last frost, or sown directly outdoors when soil is workable; in mild climates, autumn sowing may be possible. Sow on the surface or barely cover, as light aids germination. Maintain 18–22°C and even moisture; expect sprouting in roughly 2–4 weeks. A brief pre-chill of 1–2 weeks can improve uniformity but is optional. Move seedlings on after true leaves appear and transplant once frost has passed into free-draining soil in sun to light shade. Space 30–45 cm; plants form clumps and may spread by rhizomes, so containment or root barriers help maintain defined borders. Water to establish, then allow the top layer to dry slightly between waterings. Stems with their papery, lantern-like calyces dry well for long-lasting displays; harvest when colour is fully developed. In colder climates, mulch lightly and remove old stems in late winter to refresh growth. Parent site: SeedsChoice.
€4,95
