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Pilea peperomioides
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Philodendron erubescens · Araceae
Philodendron erubescens is a climbing aroid native to the rainforests of Colombia and other parts of South America. It is best known in cultivation as the 'Pink Princess' selection, which produces striking variegated leaves displaying patches of deep burgundy, dark green, and pale to vivid pink. The pink colouration results from a lack of chlorophyll in affected leaf sectors, a trait that is inherently unstable and can revert under certain growing conditions.
Photo: Alialb / CC BY-SA 4.0 via Wikimedia Commons
Pink Princess Philodendron requires bright, indirect light to maintain its variegation. Direct sun, particularly from a south-facing window in summer, can scorch the leaves, while insufficient light causes the plant to produce predominantly dark green leaves with little or no pink. An east- or west-facing windowsill, or a position set back from a south-facing window with sheer curtains, generally produces the best balance of growth and variegation. Supplemental grow lights can be used successfully in darker rooms, keeping the light source 20-30 cm from the foliage on a 12-14 hour cycle.
Water thoroughly, allowing excess to drain freely from the pot, then wait until the top 3-5 cm of the potting mix has dried before watering again. Overwatering is the most common cause of decline; the plant is more tolerant of slight underwatering than of consistently wet conditions. Reduce watering frequency in autumn and winter when growth slows. Always use room-temperature water, and if your tap water is heavily chlorinated, allowing it to sit overnight or using filtered water is advisable.
A loose, well-aerated aroid mix is essential to prevent root rot. A suitable mix can be made by combining standard peat-free houseplant compost with perlite, orchid bark, and a small amount of horticultural charcoal in roughly equal parts. The goal is a substrate that retains adequate moisture for root uptake but drains quickly and does not compact. Avoid dense, peat-heavy composts, which retain water excessively and restrict airflow around the roots.
Feed with a balanced, water-soluble fertiliser (such as a 20-20-20 or similar NPK ratio) diluted to half strength every two to four weeks during the growing season from spring through early autumn. Avoid feeding in winter when the plant is not actively growing, as unused fertiliser salts can accumulate and damage roots. Some growers apply a lower-nitrogen fertiliser periodically to encourage leaf variegation, though evidence for this is largely anecdotal; consistent bright light is the more reliable factor.
As a tropical rainforest plant, P. erubescens prefers humidity levels of 50% or higher. In typical UK homes, ambient humidity often falls below this, especially in winter when central heating is running. A humidifier placed nearby is the most effective solution; grouping plants together or placing the pot on a tray of moist pebbles can offer a modest benefit. The plant performs best between 18-29°C and should be kept away from cold draughts, open windows in winter, and heat sources such as radiators, which dry the air and can damage foliage.
Repot every one to two years, or when roots begin to emerge from the drainage holes or circle visibly at the soil surface. Choose a pot only one size larger (2-3 cm wider in diameter) than the current one, as excessively large pots hold surplus moisture and increase the risk of root rot. Terracotta pots aid aeration and drying of the substrate. Spring is the ideal time to repot, allowing the plant to establish before the main growing season. Handle the roots gently and avoid disturbing them more than necessary.
Pruning is used to manage size, encourage branching, and remove any fully reverted (entirely green or entirely pink) stems. Use clean, sharp scissors or secateurs sterilised with isopropyl alcohol before use. Cutting just above a node encourages new growth from that point. Stems that have reverted to all-green growth should be removed promptly, as they grow more vigorously than variegated stems and can come to dominate the plant. Fully pink (achlorophyllous) stems should also be removed as they are unable to photosynthesise and will eventually die back.
Cut a stem section bearing at least one node and one leaf, using sterilised secateurs. Place the node in a jar of clean water or insert it into moist perlite or sphagnum moss, keeping it warm and in bright indirect light until roots of 2-3 cm develop, then pot into aroid mix.
On an established stem, make a shallow upward-angled cut just below a node, pack the wound with moist sphagnum moss, and wrap tightly in clear polythene film sealed at both ends. Once visible roots have filled the moss ball (typically four to eight weeks), sever the stem below the root mass and pot it up.
Native to Colombia.
The genus name Philodendron derives from the Greek words 'philos' meaning loving and 'dendron' meaning tree, referring to the climbing habit of many species in the genus, which grow up and around trees in their native habitats. The species epithet erubescens comes from the Latin 'erubescere', meaning to blush or become red, alluding to the reddish colouration of the new leaf sheaths, stems, and undersides of young leaves, which is a characteristic of the species even in non-variegated forms.
Philodendron erubescens was formally described by the botanist Karl Koch and Augustin Pyramus de Candolle's son Alphonse de Candolle in the mid-nineteenth century, based on specimens collected from Colombia. The species was cultivated as an ornamental foliage plant in European glasshouses during the Victorian era, prized for its rich coloured stems and large glossy leaves. The 'Pink Princess' selection, characterised by pink chimeric variegation, is believed to have originated in tissue culture or selective breeding programmes in Florida, United States, in the 1970s, and it rose to extraordinary international prominence during the houseplant boom of the early 2020s, becoming one of the most sought-after and heavily counterfeited houseplants in the market.
The most widely traded form, selected for high contrast between dark burgundy-green and bright pink variegation; the 'Pink Princess' name is a trade descriptor rather than a formal cultivar name.
A white-variegated counterpart that produces cream or white patches rather than pink; sometimes sold as a distinct plant but belongs to the same species complex.
Features white variegation similar to White Princess but with distinctly dark brownish-purple stems, helping to distinguish it from White Princess.
A non-variegated cultivar selected for deep, near-black burgundy foliage; grown for dramatic foliage colour rather than variegation.