Cordyline fruticosa ‘Glauca’

Identity and natural origin of Cordyline fruticosa ‘Glauca’

Today this cultivar is known as Cordyline fruticosa ‘Glauca’, although older plants may still carry the name Cordyline brasiliensis ‘Glauca’. That older usage explains the two labels found in some collections. Cordyline fruticosa itself comes from Papuasia and the western Pacific and grows in warm, wet tropical areas.

Indoor care for Cordyline fruticosa ‘Glauca’

• Water: Wait until the surface has dried while the mix below remains lightly moist, then water well and let the excess drain.
• Light: Bright indirect light gives the strongest growth. It can also grow in moderate indoor light if new leaves stay firm and the crown remains dense.
• Temperature and humidity: Keep ‘Glauca’ warm, preferably above 15°C. Moderate humidity is suitable, with enough airflow for the leaves to dry after cleaning.
• Potting mix: Use a loose, slightly acidic mix that holds some moisture and drains well; bark, coir and pumice are all suitable.
• Water quality: Because this species is fluoride-sensitive, use lower-fluoride water where practical.
• Feeding: A dilute complete fertiliser is enough while the plant is growing. Heavy feeding can add salts around the roots, so keep the dose modest. When new leaves appear more slowly, reduce feeding and water less often.
• Structure and pruning: The canes naturally hold the crowns upright. A bare cane can be shortened when new leaves are appearing, and new shoots may then emerge lower down the stem.
• Repotting and propagation: Repot when roots fill the pot, the mix has compacted or watering becomes uneven. Stem tips, cane pieces and rooted shoots can all be used for propagation.

Warning signs on Cordyline fruticosa ‘Glauca’

• Many leaf tips brown while the rest of the leaves stay green: Fluoride, fertiliser salts or repeated drying are the main suspects. Keep watering more consistent, wash excess salts from the pot and switch to lower-fluoride water if new leaves continue to develop the same damage.
• The crown becomes pale and new leaves are small: Check light and root health before increasing fertiliser. If the roots look healthy, move the plant to a brighter spot.
• Fine pale speckling and webbing develop: Spider mites are likely. Rinse both sides of the leaves and isolate the plant. If mites remain, use a spider-mite product labelled for ornamental plants and repeat it as directed.
• Young leaves develop oval tan or red-brown spots with yellow edges: Fusarium leaf spot is one possible cause. Remove badly marked foliage, keep the crown dry and improve air circulation.
• Lower leaves wilt while the roots turn brown and soft: Prolonged wetness can damage the roots, while root disease can look similar. If the problem follows a waterlogged pot, remove soft roots with a clean, disinfected tool and repot the remaining healthy plant. Isolate and discard the plant if decay keeps spreading or reaches the stem.

Cordyline fruticosa ‘Glauca’ is toxic to people and pets

• Keep this plant away from children, cats and dogs.
• It contains saponins that can irritate the mouth and digestive tract.
• Chewing may cause drooling, vomiting, stomach pain, reduced appetite or weakness. Contact a veterinarian or medical professional if symptoms develop.

Why is it called Cordyline fruticosa?

Cordyline comes from Greek kordyle, meaning club, referring to its thickened underground stems. Fruticosa means shrubby and describes its woody growth.

Robert Brown established the genus Cordyline in 1810 in Prodromus Florae Novae Hollandiae, page 280; Philibert Commerson had proposed the name.

Carl Linnaeus first described it as Convallaria fruticosa in 1754 in Herbarium Amboinense, page 16. Auguste Jean Baptiste Chevalier later placed it in Cordyline as Cordyline fruticosa in 1919 in Catalogue des Plantes du Jardin Botanique de Saïgon, page 66.