Coleus (Coleus scutellarioides)

About Coleus (Mayana)

Coleus — universally called mayana in the Philippines — is a plant so deeply woven into Filipino gardening culture that nearly every household in the country has grown one at some point. Scientifically known as Coleus scutellarioides (syn. Plectranthus scutellarioides, Solenostemon scutellarioides), this member of the Lamiaceae (mint family) is native to Southeast Asia, including the Philippines, where it has been cultivated for both ornamental beauty and traditional medicine for centuries. Unlike many popular ornamental plants that were imported from distant continents, mayana is genuinely ours — a native plant that thrives in Philippine soil and climate as if the islands were made for it.

What makes coleus extraordinary among foliage plants is the staggering range of leaf colors and patterns available. No other plant genus offers such variety: leaves can be solid crimson, deep purple, lime green, salmon pink, chocolate brown, orange, gold, or — most commonly — wild combinations of multiple colors in stripes, splashes, scalloped edges, and veined patterns. A single collection of different coleus varieties creates a living palette that rivals a flower garden, and every leaf is a unique artwork. This endless color diversity, combined with the plant's almost absurd ease of propagation, has made mayana the most shared plant in Filipino communities for generations.

Coleus grows as a bushy, semi-succulent herb reaching 30 to 90 cm tall depending on variety and care. The square stems (a characteristic of the mint family) bear opposite pairs of ovate, often serrated or deeply lobed leaves that range from 5 to 15 cm long. The plant's growth rate is remarkably fast — one of the fastest among common ornamentals — with well-fed coleus adding visible new growth weekly during the wet season. This vigor means a small cutting can become a substantial specimen within just a few months, and a single plant can supply an entire neighborhood with cuttings in one growing season.

Beyond its ornamental value, mayana holds a special place in Filipino culture as a traditional medicinal plant. Generations of Filipino grandmothers have used heated mayana leaves as a poultice for headaches, applied crushed leaves to minor skin irritations, and brewed leaf preparations for coughs and fevers. While these folk remedies have not been rigorously validated by modern clinical studies, they represent a living tradition of indigenous plant knowledge that connects contemporary Filipino gardeners to their ancestors. Growing mayana is not merely keeping a pretty plant — it is participating in a cultural practice that spans centuries.

History & Cultural Roots

Coleus has been cultivated across Southeast Asia since antiquity, with its center of diversity and probable origin spanning the region from India through the Malay Archipelago to the Philippines and Indonesia. European botanical explorers encountered the plant during the colonial period, and by the 19th century coleus had become a sensation in Victorian England, where elaborate "carpet bedding" garden designs used coleus patterns as living tapestries. The Victorian enthusiasm for coleus launched a global breeding industry that eventually produced thousands of named varieties — a tradition that continues today with modern breeders in the United States, Japan, and Thailand releasing new series annually.

In the Philippines, mayana predates all of this Western horticultural history. The plant was already established in Filipino gardens and folk medicine long before Spanish colonization. The Filipino name "mayana" itself suggests deep indigenous roots — it is not a loan word from Spanish or English but a term that varies across Philippine languages (mayana, mayana-mayana, bayabang, and other regional names), indicating long familiarity across diverse ethno-linguistic groups. Quisumbing's landmark 1951 work on Philippine medicinal plants documents mayana's extensive use in traditional healing practices throughout the archipelago, from Luzon to Mindanao.

The 21st century has brought a renaissance for coleus. Modern breeding programs have produced "sun coleus" varieties that thrive in full sun (traditional types prefer shade), dramatically expanding the plant's landscaping potential. Series like Premium Sun, Wizard, Kong (with leaves the size of a hand), and ColorBlaze have elevated coleus from a humble garden filler to a premium landscape plant commanding serious attention from professional designers. In the Philippines, this modern coleus revolution has merged beautifully with the existing mayana tradition — Filipino gardeners now grow both their lola's classic mayana cuttings and the latest international varieties side by side, bridging heritage and innovation in a single garden bed.

How to Plant Coleus (Mayana) in the Philippines

Coleus is one of the most accessible plants in the Philippines. Traditional mayana cuttings are free — just ask a neighbor, relative, or fellow gardener. Every barangay has at least one tita or lola with a mayana collection who will happily share cuttings. Nursery seedlings cost ₱20-100 at garden centers, palengke, and weekend plant tiangge. Modern premium varieties (Kong, Wizard, Premium Sun, ColorBlaze series) run ₱100-500 per pot at specialty plant shops and online sellers.

Planting Steps

1. Get a cutting (the Filipino way): Ask any gardening neighbor, lola, or friend for a 10-15 cm stem cutting — mayana is the most freely shared plant in the Philippines. Cut just below a leaf node, remove the lower 2-3 sets of leaves, and keep the top leaves intact. You can also buy potted seedlings at any garden center from ₱20-100.
2. Root in water — fastest propagation on earth: Place the stem cutting in a glass of clean water with 2-3 nodes submerged. Set in a bright spot away from midday sun. Watch in amazement as roots appear in just 3-5 days. Change water every 2-3 days to keep it fresh. Once roots reach 3-5 cm, the cutting is ready for soil. Alternatively, push cuttings directly into moist soil where they root just as readily.
3. Plant in rich, moist soil: Use a fertile mix: garden soil + compost + coco peat (1:1:1). Coleus is a hungry plant that loves rich soil. Plant the rooted cutting with 2 nodes buried. Water deeply after planting. For garden beds, space plants 20-30 cm apart. For pots, use at least 15-20 cm containers. Mulch around garden plants with dried leaves or coco husk to retain moisture.
4. Position based on variety type: Traditional mayana: partial shade — morning sun with afternoon shade, under tree canopy, or covered patio. Sun coleus varieties: full sun is fine. When in doubt, morning sun with afternoon shade works for all types. Avoid deep shade for all varieties — it causes leggy, pale growth.
5. Pinch tips immediately and often: Start pinching growing tips when the plant has 3-4 sets of leaves. Pinch every 2-3 weeks. Each pinch produces two new branches, creating bushy, full plants instead of lanky single stems. Root the pinched tips as new cuttings — instant multiplication. This is the single most important coleus care practice.

Propagation

Coleus is possibly the easiest plant on earth to propagate. Stem cuttings root in water in 3-5 days — an almost unbelievably fast turnaround. Simply cut a 10-15 cm tip with 3-4 nodes, remove lower leaves, and place in water. Roots are visible within days. You can also push fresh cuttings directly into moist soil where they root in about a week. Division of established clumps works well for mature plants. Seeds are also viable but varieties rarely come true from seed, so cuttings are preferred for maintaining specific colors. Regular pinching provides an endless supply of propagation material — a single well-maintained coleus produces dozens of viable cuttings per season.

Care Guide

Sunlight

Partial shade to full sun depending on variety — this distinction matters. Traditional mayana varieties perform best in partial shade: morning sun (2-4 hours) with afternoon shade or dappled light through a tree canopy. In harsh Philippine afternoon sun, shade varieties wilt, scorch, and lose color intensity. Modern "sun coleus" varieties (Premium Sun, Wizard Sun, Solar, ColorBlaze series) have been bred to handle full sun including intense tropical afternoon light — they actually develop their most vivid colors under strong light. When variety type is unknown, morning sun with afternoon shade is the safest default. In deep shade, all coleus types grow leggy with muted colors.

Water

Moderate — keep the soil consistently moist but not waterlogged. Coleus wilts dramatically when dry, collapsing almost theatrically as leaves go limp. The good news: it recovers just as dramatically, perking back up within hours of a thorough watering. Despite this resilience, repeated wilt-recovery cycles stress the plant and diminish foliage quality. In Philippine conditions, water daily during the hot dry season, every 2-3 days during the wet season (adjusting for rainfall). Container coleus dries faster than garden plants and may need daily watering year-round. Mulch around garden plants conserves soil moisture significantly.

Soil

Rich, moist, well-draining soil with a pH of 6.0-7.0. Coleus is a heavy feeder that performs best in fertile soil amended with compost. A productive mix: garden soil + compost + coco peat (1:1:1). For containers: commercial potting mix enriched with additional compost or worm castings. The soil should hold moisture well (coleus dislikes drying out) while still draining excess water (standing water causes root rot). Adding rice hull ash or perlite improves drainage in heavy clay soils. Top-dress with compost every 2-3 months to replenish nutrients.

Humidity & Temperature

Coleus thrives in Philippine humidity levels of 60-85% — no supplemental humidity needed in most Filipino environments. The plant grows best at temperatures between 20-35°C, which encompasses standard Philippine lowland conditions year-round. Coleus is frost-sensitive and suffers below 10°C, but this is irrelevant in Philippine lowlands. In air-conditioned rooms, coleus may need more frequent watering as the dry air accelerates moisture loss. High altitude areas like Baguio provide cooler temperatures that can slow growth but also extend the plant's lifespan and reduce bolting (premature flowering).

Fertilizer

Feed coleus regularly for the most vibrant foliage — this is a hungry, fast-growing plant. Apply diluted liquid fertilizer (balanced 14-14-14 or 10-10-10) every 2 weeks during active growth. Organic options work beautifully: fish emulsion, worm tea, or compost tea. Avoid excessive nitrogen, which promotes lush but soft growth vulnerable to pests. For container coleus, feed weekly at half-strength since nutrients leach with frequent watering. Slow-release granules (Osmocote or similar) applied every 3 months provide steady nutrition with less effort. Stop fertilizing if the plant bolts (flowers) — focus on pinching flowers and restoring vegetative growth first.

Pruning

Regular pinching is the cornerstone of coleus care — more important than any other maintenance task. Pinch growing tips every 2-3 weeks, removing the top 2-5 cm of each stem. This forces two new branches at each pinch point, creating exponentially bushy growth. Remove flower spikes immediately by pinching them at the base — flowering triggers decline. Leggy or overgrown plants can be cut back hard to 10-15 cm above soil; they regenerate quickly with fresh, compact growth. Save all cuttings for propagation — nothing goes to waste. Clean scissors or simply pinch with fingernails (coleus stems are soft and easy to snap).

Growing Medium Options

Ornamental Uses

Coleus is one of the most versatile ornamental plants available to Filipino gardeners — capable of providing flower-garden-level color impact using foliage alone. Because the color comes from leaves rather than flowers, the display is continuous and season-long rather than limited to a brief bloom period. This makes coleus invaluable for creating reliable, persistent color in Philippine gardens.

Garden & Landscape Applications

• Mass bedding and borders: Plant a single variety in sweeping drifts or rows for dramatic blocks of color along walkways, fences, and garden edges. Contrasting varieties planted in alternating rows create striking visual patterns reminiscent of the Victorian carpet bedding tradition that first made coleus famous worldwide
• Mixed container and hanging basket: Combine upright coleus varieties (center) with trailing types (edges) in large pots or hanging baskets for cascading color displays on porches, balconies, and covered patios. Plant 3-5 cuttings per container for immediate impact
• Shade garden color anchor: In shaded areas where flowering plants struggle, coleus provides the color that shade gardens desperately need. Pair with ferns, caladiums, and hostas for a lush, layered tropical look under tree canopy
• Living hedge and screen: Tall-growing varieties like the Kong series (reaching 60-90 cm) planted closely create informal seasonal hedges with massive, brilliantly colored leaves that provide both privacy and ornamental impact
• Windowsill and indoor display: Compact varieties in decorative pots brighten kitchen windowsills, study desks, and living room shelves. Near east-facing windows is ideal for indoor coleus — sufficient morning light for good color without the harsh afternoon sun that can stress indoor plants

Air Quality & Oxygen

While coleus has not been specifically featured in major air quality studies like the NASA Clean Air Study, all actively photosynthesizing green plants contribute to indoor air quality through the basic processes of gas exchange: absorbing carbon dioxide and releasing oxygen during photosynthesis. Coleus, with its dense canopy of broad leaves and vigorous growth rate, provides meaningful photosynthetic surface area — particularly when grown in multiples, as is common in Filipino households where several coleus pots line windowsills and patios.

The broader benefit of growing coleus indoors and in outdoor container gardens is the psychological and aesthetic contribution to living spaces. Research consistently shows that the presence of green, living plants in homes and workspaces improves mood, reduces stress, and enhances perceived air quality and comfort. The vivid, varied colors of coleus make it particularly effective at creating a sense of lush, living environment — a meaningful contribution in urban Filipino settings where access to green space may be limited. A windowsill lined with colorful mayana brings a piece of the garden into even the smallest Manila apartment.

Toxicity & Safety

Humans: Coleus is not considered toxic to humans. In fact, mayana has been used in Filipino traditional medicine for centuries — leaves are applied as poultice, brewed as tea, and handled extensively without adverse effects. However, as with any plant used medicinally, traditional preparations should not substitute for professional medical advice. Some individuals may experience mild skin sensitivity from prolonged sap contact. The essential oils in coleus leaves (a mint family trait) are aromatic and generally harmless but may cause mild stomach discomfort if large quantities of raw leaves are consumed.

Pets: Coleus is generally considered non-toxic to dogs and cats. It does not contain the dangerous calcium oxalate crystals found in many popular ornamental plants (philodendron, dieffenbachia, aglaonema). However, as with any non-food plant, ingestion of coleus leaves may cause mild gastrointestinal upset — vomiting or diarrhea — simply because pet digestive systems are not designed to process plant material. This is a general reaction rather than a toxicity response. Some older veterinary references assign a low-level caution to coleus, but serious toxicity from coleus ingestion in pets has not been documented. Coleus is among the safer ornamental plant choices for households with curious pets.

Common Pests & Diseases in the Philippines

• Mealybugs: White, cottony masses at leaf axils and stem joints — the most frequent coleus pest. They suck sap and excrete sticky honeydew. Treat with neem oil spray, alcohol-dipped cotton swabs for small infestations, or insecticidal soap. Regular inspection during pinching sessions catches infestations early before they spread.
• Aphids: Small green or black soft-bodied insects clustering on new growth tips and undersides of young leaves. They distort new growth and spread viral diseases. Strong water spray dislodges light infestations. Neem oil or insecticidal soap for persistent problems. Ladybugs are natural predators — attract them with companion plants.
• Downy mildew (Peronospora): A serious coleus disease — causes brown-edged, curling leaves and stunted growth. Grayish fuzz on leaf undersides. Spreads rapidly in humid, poorly ventilated conditions. Remove affected leaves immediately. Improve air circulation by spacing plants adequately. Avoid overhead watering. Fungicide sprays can help in severe cases. Some modern varieties have improved resistance.
• Root rot: Caused by overwatering and poor drainage — stems turn mushy and brown at the soil line, leaves wilt permanently. Prevention: well-draining soil, drainage holes, avoid waterlogging. Infected plants are difficult to save — take healthy cuttings from unaffected stems and start fresh with better drainage.
• Slugs and snails: Chew irregular holes in coleus leaves, especially during the wet season and at night. Handpick at dusk. Use crushed eggshells, diatomaceous earth, or commercial slug bait around plant bases. Raised containers reduce slug access compared to ground-level garden beds.
• Bolting (flowering): Not a pest but a major management issue — coleus that flowers redirects energy from foliage to seed production, causing leaf quality to decline rapidly. Leaves become smaller and less colorful, stems stretch, and the plant may die after setting seed. Prevention: pinch flower spikes immediately upon appearance. Regular tip-pinching delays flowering by constantly removing terminal buds.

Frequently Asked Questions

Sources

• Plants of the World Online — Coleus scutellarioides. Royal Botanic Gardens, Kew.
• Quisumbing, E. (1951). Medicinal Plants of the Philippines. Bureau of Printing, Manila.
• ASPCA — Animal Poison Control Center: Toxic and Non-Toxic Plant Lists — Coleus.
• Armitage, A.M. (2001). Armitage's Manual of Annuals, Biennials, and Half-Hardy Perennials. Timber Press.
• Stuart, G.U. (2015). Philippine Medicinal Plants: Mayana. StuartXchange.

This guide is for informational purposes. Traditional medicinal uses of mayana are cultural references, not medical advice. Consult a healthcare professional for medical concerns.