Introduction & Discovery

Phlebodium aureum 'Davana' is a compact, ornamental cultivar of the blue star fern, selected for its manageable size, intensely glaucous blue-green fronds, and slightly ruffled pinna margins that give it a softer, more textured appearance than the typical species. As a cultivar of one of the most popular and widely grown fern species in the world, 'Davana' inherits the exceptional ease of cultivation and environmental tolerance that have made Phlebodium aureum a staple of the houseplant trade, while offering a more refined, compact form better suited to modern indoor spaces where a full-sized blue star fern might overwhelm. The parent species, Phlebodium aureum, is native to tropical and subtropical regions of the Americas, where it grows as an epiphyte on tree trunks and palm crowns, its distinctive golden-scaled rhizome creeping through accumulated debris. The species has been cultivated since at least the nineteenth century and has given rise to several named cultivars distinguished by differences in frond size, pinna shape, and overall growth habit. 'Davana' is among the most recent of these selections, developed through horticultural selection for the ornamental houseplant market. The cultivar name 'Davana' is a trade name applied to this compact selection, which has been popularized through the Dutch horticultural industry and is now widely available in garden centers and plant shops throughout Europe and North America. It is characterized by fronds reaching approximately 30 to 50 centimeters (12–20 inches) in length, significantly smaller than the typical species which can produce fronds exceeding one meter. The pinnae are slightly narrower and more closely spaced than in the standard species, with gently ruffled or undulate margins that add visual texture. For the indoor gardener, 'Davana' represents perhaps the most accessible entry point into Phlebodium cultivation. Its compact size suits windowsills, shelves, and small plant stands where larger ferns would be impractical. Its tolerance of moderate humidity (as low as 40 percent), occasional neglect, and a range of light conditions from medium indirect to bright filtered light makes it one of the most forgiving ferns available for indoor cultivation.

Discovery & Naming

Phlebodium aureum 'Davana' is a horticultural cultivar rather than a wild-collected species, and its history is one of selection and commercial development rather than botanical discovery. The cultivar was developed through the Dutch ornamental plant industry, which has been a global leader in fern breeding and selection for over a century. The selection process for 'Davana' involved identifying individual plants within tissue-cultured populations of Phlebodium aureum that exhibited desirable traits for the houseplant market: compact growth habit, intense blue-green coloration, slightly ruffled pinna margins, and vigorous but controlled rhizome growth. These selected individuals were then multiplied through tissue culture to produce the uniform commercial stock that entered the retail market. The cultivar name 'Davana' was registered as a trade name, following the increasingly common practice in the ornamental plant industry of applying distinctive names to selected clones for marketing purposes. The name does not have a formal botanical standing under the International Code of Nomenclature for Cultivated Plants but serves as the recognized commercial designation. Since its introduction to the market, 'Davana' has become one of the most commercially successful fern cultivars, widely available in garden centers throughout Europe, North America, and Australasia.

Frond Morphology

The fronds of Phlebodium aureum 'Davana' are deeply pinnatifid, divided nearly to the rachis into lateral pinnae that remain connected by a narrow wing of lamina tissue. Mature fronds typically measure 30 to 50 centimeters (12–20 inches) in total length, approximately 40 to 60 percent the size of fronds on the standard species. The stipe is 10 to 20 centimeters (4–8 inches) long, slender, pale green to straw-colored, and smooth except for a few scattered scales near the base. The pinnae number five to nine per side, are oblong with rounded to bluntly acuminate apices, and measure 7 to 14 centimeters (2.8–5.5 inches) long and 2 to 3.5 centimeters (0.8–1.4 inches) wide. The distinguishing feature of 'Davana' is the gently undulate or ruffled pinna margin, which gives the fronds a softer, more textural quality than the flat-margined standard species. This subtle ruffling is most pronounced in the proximal portion of each pinna and becomes less evident toward the tip. The frond surface displays the characteristic Phlebodium glaucous bloom, a waxy epicuticular coating that produces the distinctive blue-green or silver-blue color. In 'Davana', this coloration is particularly intense on newly expanded fronds, which emerge with a pronounced silvery-blue cast that gradually becomes more green as the frond ages. The texture is subcoriaceous, firm but flexible. Venation follows the standard Phlebodium pattern of reticulate veins forming areolae with included free veinlets. Sori are round, large (2–3 millimeters diameter), exindusiate, arranged in a single row between the costa (midvein of each pinna) and the margin, typically four to eight sori per pinna. Mature sori are golden-orange, providing an attractive color contrast against the blue-green lamina. The rhizome is thick, creeping, 5 to 10 millimeters in diameter, densely covered with golden-brown, lanceolate, peltate scales characteristic of the genus. The rhizome surface, when visible between the scales, has a distinctive golden-orange color.

Native Range & Distribution Map

Distribution map showing the native range of Phlebodium aureum 'Davana'.

Biology & Frond Morphology

As a cultivar of Phlebodium aureum, 'Davana' shares the fundamental biology of the species while exhibiting the reduced stature and modified pinna morphology selected by horticulturists. The cultivar is propagated exclusively by vegetative means (rhizome division or tissue culture) to maintain its distinctive characteristics, as spore-grown progeny would segregate and produce a range of phenotypes including reversion to the standard species form. The compact growth habit of 'Davana' appears to result from shortened internodes on the rhizome and proportionally smaller fronds, rather than from a fundamentally different growth rate. The rhizome extends at approximately 5 to 10 centimeters (2–4 inches) per year, slightly slower than the species type, and new fronds are produced at intervals of two to five weeks during the active growing season. Photosynthesis follows the C3 pathway, with the glaucous wax coating modulating light absorption by reflecting a portion of incident radiation, particularly in the blue and ultraviolet wavelengths. This reflective property gives the fronds their characteristic color and also provides some protection against photoinhibition under bright conditions, contributing to the cultivar's tolerance of relatively high light levels for a fern. The thick rhizome functions as a significant water and carbohydrate storage organ, enabling the plant to survive periods of neglect that would be fatal to many other fern species. This storage capacity is the primary basis for the cultivar's reputation as one of the most forgiving ferns for indoor cultivation. During drought stress, fronds may wilt but the rhizome retains viability, and rewatering typically results in the production of new fronds within a few weeks. Commercial production of 'Davana' relies heavily on tissue culture propagation, which allows rapid multiplication of uniform stock plants for the retail market. This technique has contributed significantly to the cultivar's widespread availability and consistent quality.

Spore Dispersal

While Phlebodium aureum 'Davana' does produce fertile fronds with viable sori and sporangia, the cultivar is not typically propagated from spores in a commercial or horticultural context. Spore-grown offspring would not reliably reproduce the compact habit and ruffled pinna margins of the cultivar, instead producing a range of phenotypes as the selected traits segregate in the gametophyte generation. Nevertheless, the biology of spore production and dispersal in 'Davana' follows the standard pattern for P. aureum. The large, round sori produce numerous sporangia, each containing 64 monolete spores approximately 50 to 65 micrometers in length. The spores are released through the standard annulus mechanism as the sporangia dry, and they are readily dispersed by air currents. In regions where 'Davana' is grown outdoors, escaped spores could potentially germinate and establish wild-type P. aureum populations, as has occurred with the species in various tropical and subtropical regions around the world. In southern Florida, the Canary Islands, and parts of tropical Australia, P. aureum has naturalized successfully from cultivated stock, colonizing palm trees and other rough-barked hosts. For growers interested in the developmental biology of ferns, observing spore production and release on 'Davana' provides an accessible window into fern reproductive biology, as the large, conspicuous sori are easily examined with a hand lens or low-power microscope.

Reproduction & Propagation

Rhizome division is the appropriate propagation method for Phlebodium aureum 'Davana', as it preserves the cultivar's distinctive characteristics. Spore propagation, while biologically possible, would produce offspring that vary from the parent and may resemble the standard species rather than the compact 'Davana' form. To divide, remove the plant from its container and examine the rhizome system. Select a section of rhizome at least 8 to 12 centimeters (3–5 inches) long with at least two healthy fronds and visible roots. Using a clean, sharp blade, cut through the rhizome decisively. Dust the cut surfaces with cinnamon or powdered sulfur to prevent fungal infection. Pot each division in fresh, well-draining substrate and water lightly. Place in a warm location (65–75 °F / 18–24 °C) with bright indirect light. Avoid covering with plastic or enclosing in high humidity, as this promotes rot in the cut rhizome. New root growth should appear within three to four weeks, and the first new frond within four to eight weeks. Commercial propagation of 'Davana' relies on tissue culture (micropropagation), which allows rapid production of large numbers of genetically identical plants from small tissue explants. This technique is beyond the scope of home propagation but explains the uniformity and widespread availability of the cultivar in retail settings. Established plants naturally produce branching rhizomes over time, and these branches can be separated as self-rooting divisions without the need to cut through the main rhizome, reducing the risk of rot.

Cultivation & Substrate

Phlebodium aureum 'Davana' is one of the easiest ferns to cultivate indoors, tolerating conditions that would challenge or kill many other fern species. Its care requirements are straightforward and forgiving, making it an ideal fern for beginners and experienced growers alike. The substrate should be well-draining but need not be as specialized as that required for more demanding epiphytic ferns. A standard peat-based houseplant mix amended with additional perlite (1:1 ratio) provides adequate drainage and moisture retention. Alternatively, a dedicated epiphytic mix of orchid bark, perlite, and sphagnum moss works excellently. The pot should have drainage holes, and a shallow, wide container suits the creeping rhizome growth habit. Watering is the single most important care consideration. Allow the substrate surface to dry to the touch between waterings, then water thoroughly. The thick rhizome stores water effectively, and 'Davana' tolerates occasional forgotten watering far better than most ferns. However, prolonged drought will cause frond dieback, and chronically overwatered plants develop root rot. Finding the balance is intuitive with experience. Light requirements are flexible. The plant thrives in medium indirect light (1,500–3,500 lux) but tolerates lower light levels for extended periods and can handle some direct morning sun without damage. The blue-green color is most vivid under moderate light. Humidity tolerance is exceptional for a fern. 'Davana' performs well at humidity levels as low as 40 percent, adequate for most centrally heated homes. Higher humidity of 50 to 70 percent promotes lusher growth but is not strictly necessary. Temperatures of 55 to 85 °F (13–29 °C) are tolerated, with optimal growth at 65 to 78 °F (18–26 °C). Fertilize monthly during spring and summer with a balanced liquid fertilizer at half strength.

Common Mistakes to Avoid

The most common mistake with Phlebodium aureum 'Davana' is overwatering. Despite being a fern, this species does not appreciate constantly wet substrate. The thick rhizome is prone to rot if waterlogged, and chronic overwatering is the primary cause of plant death. Allow the substrate to dry between waterings and ensure the pot has adequate drainage. Burying the rhizome beneath the substrate is another frequent error. The creeping rhizome should sit on or just at the substrate surface, with only the roots entering the medium. A buried rhizome is more susceptible to rot and cannot extend properly to produce new fronds. Placing the plant in deep shade because it is a fern leads to leggy, pale growth and reduced frond production. While 'Davana' tolerates low light, it performs best in medium to bright indirect light. Using heavy, clay-based potting soil without adequate drainage amendment creates waterlogged conditions. Always amend the substrate with perlite or bark to ensure free drainage. Mistaking the golden-brown rhizome scales for a pest infestation is a surprisingly common confusion among novice growers. The densely scaled rhizome is a normal and characteristic feature of the genus; no treatment is needed. Finally, panic at the sight of a few yellow or brown older fronds is unnecessary. Periodic frond senescence is normal, and old fronds should be trimmed at the base to maintain a tidy appearance.

Seasonal Considerations

Phlebodium aureum 'Davana' requires minimal seasonal care adjustments in most indoor environments, a key factor in its popularity as a low-maintenance houseplant. Nevertheless, subtle seasonal changes optimize plant health and appearance. During spring, the plant responds to increasing light levels with renewed frond production. Begin monthly fertilization with a balanced liquid fertilizer at half strength. This is the optimal time for repotting if the rhizome has outgrown its container, or for dividing if propagation is desired. Fresh substrate rejuvenates growth in established plants. Summer is the period of maximum growth, with new fronds appearing every two to four weeks. Maintain consistent watering, allowing the substrate to dry between applications. In very warm climates (above 85 °F / 29 °C), the plant may slow growth slightly; provide some relief by moving to a cooler position if possible. Autumn brings a gradual slowing of growth. Reduce fertilization to every six to eight weeks, then cease by late autumn. Allow the substrate to dry somewhat more between waterings as growth slows and transpiration rates decrease. Winter is a period of minimal growth but not true dormancy. The plant maintains its existing fronds and may occasionally produce new ones. The primary winter challenge in heated homes is not cold but dry air; however, 'Davana' tolerates lower humidity than most ferns and typically shows no distress at typical indoor winter humidity levels of 30 to 45 percent. If frond tips do brown in very dry conditions, a pebble tray or weekly misting is sufficient to correct the issue. Resume normal watering and fertilization schedules as spring returns and growth accelerates.

Diseases & Pests

Phlebodium aureum 'Davana' is disease-resistant when provided with appropriate cultural conditions, particularly regarding drainage and watering. The most significant disease issue is rhizome rot, caused by oomycete pathogens (Pythium, Phytophthora) in waterlogged substrates. This manifests as softening and darkening of the rhizome tissue, often accompanied by a musty odor and rapid frond collapse. Prevention is the best strategy: use well-draining substrate, allow drying between waterings, and ensure pots have functional drainage holes. Southern blight (Athelia rolfsii, formerly Sclerotium rolfsii) can attack the rhizome base in warm, humid conditions. White mycelial mats and small, round, mustard-colored sclerotia are diagnostic. Remove affected tissue, improve air circulation, and reduce watering. Bacterial leaf spot (Pseudomonas or Xanthomonas species) can cause water-soaked lesions that turn brown. This is uncommon and usually associated with overhead watering that leaves moisture standing on frond surfaces. Avoid wetting the fronds during watering. Pest issues are minimal. Scale insects may colonize the rhizome and stipe bases; treat with rubbing alcohol applied by cotton swab, or horticultural oil spray. Mealybugs occasionally appear but are easily controlled. Fungus gnats may breed in overly moist substrate; allowing the surface to dry between waterings discourages their larvae.

Indoor Growing & Terrariums

Phlebodium aureum 'Davana' is widely regarded as one of the best ferns for indoor cultivation, combining exceptional beauty with genuine ease of care. Its compact size, typically reaching 30 to 50 centimeters (12–20 inches) in frond length, makes it suitable for a wide range of indoor positions, from windowsills and shelves to desk tops and small plant stands. The blue-green frond color is the cultivar's primary ornamental asset and functions as a versatile design element in interior settings. The cool blue tones complement modern, minimalist decor and provide a sophisticated contrast to the warm greens of typical houseplants. 'Davana' pairs particularly well with matte white or grey ceramic containers, which echo its cool coloration. Placement is flexible. The plant thrives near north-, east-, or west-facing windows, and performs adequately even in interior rooms with artificial lighting. Avoid placing directly against cold windowpanes in winter or in the direct blast of heating vents. A position on a bookshelf, side table, or bathroom vanity all work well. The creeping rhizome will eventually extend beyond any container, and rather than viewing this as a problem, many growers treat it as a design feature, allowing the golden-scaled rhizome to trail over the container edge. In hanging baskets, this creates a particularly attractive display with fronds arching outward and the ornamental rhizome cascading below. For routine care, water when the substrate feels dry to the touch, fertilize monthly during the growing season, and trim spent fronds at their base. 'Davana' requires minimal grooming and is rarely affected by pests or diseases when watered appropriately.

Terrarium Setup

Phlebodium aureum 'Davana' can be used in terrarium settings, though its tolerance of lower humidity means it is not dependent on the enclosed environment the way many terrarium ferns are. In terrariums, the primary concern is managing moisture levels to prevent the overwatering that promotes rhizome rot in the enclosed, high-humidity environment. For terrarium use, select a moderately sized enclosure of 30 to 60 liters (8–16 gallons) to accommodate the eventual frond spread. Construct with a generous drainage layer of 3 to 4 centimeters (1.2–1.6 inches) of LECA, mesh separator, and a well-draining substrate of coco coir (30 percent), orchid bark (30 percent), perlite (25 percent), and charcoal (15 percent). Mount the rhizome on an elevated piece of cork bark or driftwood to ensure excellent drainage around the rhizome base. The golden-scaled rhizome is ornamental and should be displayed prominently. As the rhizome extends across the hardscape, it creates an increasingly natural and visually appealing display. Provide LED lighting at 1,500 to 2,500 lux for 10 to 12 hours daily. The blue-green fronds create a stunning color focal point among the greens of terrarium companions. Ventilate the terrarium frequently, perhaps leaving the lid partially open, as 'Davana' benefits from air circulation and does not require the sealed, ultra-high-humidity environment that filmy ferns demand. Water sparingly in a terrarium context; the enclosed environment retains moisture, and excess watering is the primary risk to the plant's health.

Landscape & Garden Use

Phlebodium aureum 'Davana' can be used in the garden wherever its hardiness and habitat preferences are matched. Ferns are classic choices for shaded borders, woodland gardens, stumperies, rockeries, stream-side plantings, and ground-cover under trees.

Landscape Tips

• Companions: Hostas, Astilbe, Heuchera, Tiarella, Epimedium, hellebores, snowdrops and other shade-tolerant perennials are classic partners.
• Soil preparation: Incorporate leaf mould or composted bark to improve moisture retention and mimic a forest floor.
• Mulching: A 3–5 cm mulch of chipped bark or leaf litter protects the rhizomes, conserves moisture, and slowly releases nutrients.
• Watering: Establish new plantings with regular deep watering during the first growing season; most hardy ferns need only occasional supplemental irrigation once established.

Conservation & Collector Notes

As a cultivar of garden origin propagated entirely by vegetative means and tissue culture, Phlebodium aureum 'Davana' has no conservation concerns in the traditional sense. Its existence does not depend on wild populations, and its propagation places no pressure on natural resources. The parent species, Phlebodium aureum, is widespread and common throughout the Neotropics and is not considered threatened. It has, in fact, become naturalized in several regions outside its native range, including parts of tropical Australia, southern Africa, and the Canary Islands, where it can be mildly invasive. The commercial success of cultivars like 'Davana' may have an indirect positive effect on fern conservation by increasing public awareness and appreciation of ferns as a group, potentially translating into broader support for habitat conservation measures that benefit wild fern species.