How to Grow and Care for Cordyline (Ti)

Cordyline, also known as ti, is a common decorative plant that thrives indoors or outdoors depending on where it's grown. Cordyline typically has leathery, spikey leaves in a variety of colors, including green, red, yellow, white, purple, and purplish-red. Some species in this group have fragrant flowers followed by berries. Cordyline grows best as a perennial plant in warmer climates and an annual plant in cooler climates. It requires bright but filtered sunlight, acidic soil, and humid conditions in temperatures above 62 degrees Fahrenheit indoors and out. Note that this plant is toxic to dogs and cats.

Cordyline Care

Here are the main care requirements for growing colorful, cheerful, and low-maintenance cordyline plants.

• Give your specific cordyline plant the correct amount of light, which is usually bright but indirect.
• Place cordyline in well-draining, acidic soil.
• Water cordyline only when the surface of the soil feels dry.
• Keep indoor cordyline away from drafty areas or where temperatures will frequently fluctuate.
• Protect outdoor cordyline from frost.

Light

Cordyline prefers sun over shade, but you will need to be specific with the amount of light your plant receives. Ti needs bright light, but avoid direct sunlight in unhabituated plants. Also, green-leaved cordyline tends to do best with direct light, while those with other colored leaves may prefer bright indirect or filtered sunlight.

Soil

Cordyline needs a rich, well-drained, and high-quality potting mix with a pH of 6-6.5.

Water

Ti plants prefer to be watered when the surface of the soil feels dry. Water until it starts to run out of the drainage holes. Do not put the drained water back into the plant.

Fertilizer

These plants can be fed in the spring with slow-release pellets. You can feed the plant weekly during the growing season with a liquid 20-20-20 fertilizer at half-strength. Do not fertilize during the winter.

Temperature and Humidity

Ti thrives in temperatures above 62 degrees Fahrenheit and prefers a high-humidity environment. Avoid putting the plant near a cold draft like a window. These are tropical plants, so if you're experiencing leaf drop, try raising both the temperature and humidity.

Types of Cordyline

• 'Calypso Queen' Cordyline fruticosa: Ruby-maroon leaves
• 'Oahu Rainbow' Cordyline fruticosa: Dark-green leaves streaked with pink and white
• 'Firebrand' Cordyline fruticosa: Pink leaves that darken to maroon
• 'Hilo Rainbow' Cordyline fruticosa: Deep-green foliage with pops of burgundy
• 'Hawaiin Boy' Cordyline fruticosa: Dark purple to red foliage
• 'Rubra' Cordyline fruticosa:Leaves of bronze green centers and wine-red edges
• 'Chocolate Queen' Cordyline terminalis:Chocolate and yellow-green leaves
• 'Red Star' Cordyline australis: Compact plant with bronze leaves
• 'Kiwi' Cordyline fruticosa:Palm type of shrub with arching leaves
• 'Red Sensation' Cordyline australis:Grass-like with bronze leaves

Pruning

A mature, well-trimmed plant should have stems of various heights, up to 3 or 4 feet (some stems can go much higher), and be clothed in leaves to the soil level. Over time, cordylines tend to become leggy, so you may want to trim back individual stems in a staggered pattern to keep the plant full.

Propagating Cordyline

Propagating ti is typically done with stem cuttings. The easy process is as follows:

1. Cut 3- to 5-inch pieces from mature stems and remove all of the leaves.
2. Lay the pieces in a damp mixture of sand and perlite, and keep them in a room that's at least 62 degrees Fahrenheit.
3. Shoots will grow from the eyes of the stems and can be planted in potting soil when they have about four to six leaves each. You can repot in spring or every other spring, as needed.

How to Grow Cordyline From Seed

Ti can be grown with purchased seeds or harvested seeds from the ripened berries that you may occasionally find even on an indoor plant.

1. Harvested seeds need to be squeezed out of the berry and cleaned. If you find indoor berries, just clean the seeds and let them air-dry for a few days before planting. If you find your berries outdoors, they'll need to be stratified for several months before planting.
2. When seeds are ready, sow them in well-draining, sandy compost. Germination should happen in four to six weeks, but possibly longer.

Potting and Repotting Cordyline

Cordyline grows well in pots, especially if you don't live in a tropical climate: You can just bring cordyline indoors for care during the winter. When it's time to move the plant outdoors during warmer months, make sure the outdoor soil drains well and any threat of frost has passed.

The plant doesn't need to be repotted unless it's growing too large for its pot, which might be every few years. When repotting, choose a tall pot of any material with adequate drainage holes for cordyline to accommodate the long tap root and two to three years of root growth.

Overwintering

If you're at the cooler end of cordyline's hardiness zones (9 through 11), you can tie up your plant's leaves with natural twine to keep them safe from frost damage in cooler months; just be sure they're dry before you do so to avoid rot. Outdoor cordyline plants also need to be well secured in harsh, windy conditions; the long, thin leaves can thrash in the wind and cause the plant to topple over.

Common Pests & Plant Diseases

Cordyline is prone to common pests and problems, such as scale insects, spider mites, and mealybugs. All of these can be fixed with either neem oil or insecticidal soap.

Ti also attracts bacterial leaf spot and root rot. You can try to beat both of these problems with fungicides and by making sure the plants aren't sitting in soil that's too wet.

How to Get Cordyline to Bloom

Bloom Months

Older cordyline plants may produce flowers in hot summers during June and July after which small berries will appear.

What do Cordyline Flowers Look and Smell Like

It's more typical for flowering to occur in mature outdoor varieties, but flowers can appear on houseplants. The plant will produce frothy spikes of white, pink, or pale lavender flowers that are cup-shaped and sweet-smelling.

How to Encourage More Blooms

Cordyline prefers ideal conditions to bloom. However, consider adding gibberellic acid to your cordylines to improve the quantity of blooms. This hormone reportedly helps tropical plants to flower better and can be easily found at garden centers.

Caring for Cordyline After It Blooms

When the spikes of tiny flowers fade, you can remove them or keep them as is to produce their berry-like fruits.

Common Problems With Cordyline

This otherwise easy-going tropical plant will let you know if it's in trouble by the condition of its leaves. Here's how to fix a leaf issue, plus one other issue to watch for.

Browning Tips

This is a common problem with many houseplants, including indoor-grown cordyline. The plant may be experiencing underwatering, overwatering, too much fertilizer, root rot, or even overly dry air.

However, another issue could be the salts and fluoride in the tap water used to moisten the plant. Cordyline is sensitive to fluoride, which is found in many residential water supplies. Flush the plant, or before watering, leave the water in an open container overnight to reduce chlorine and salts. You can also switch to distilled or bottled water or harvest rainwater for plants.

Leaves Turning Yellow

A second common problem with houseplants like cordyline is the yellowing of leaves. Most plants naturally shed older yellow leaves. But, if your cordyline's leaves are turning yellow, it may also mean it has a watering issue or it's getting too much sunlight. It needs indirect bright light rather than harsh rays directly on the leaves.

Yellow leaves could also mean your plant is in a spot where there are frequent temperature fluctuations. Check for drafts. Allow the leaves to drop and see how the plant fares in another spot.

If you see that the lower leaves are turning yellow, that usually means there's root rot. Check for waterlogged or blackened roots. Unfortunately, you may not be able to save a cordyline plant with root rot.

Growing Too Large

Cordyline has a vigorous root system and deep taproot. If you've planted cordyline outdoors in a raised garden bed, the root system can sometimes grow so large it may disrupt surrounding plants. If a cordyline grows too large for comfort, it may need to be transplanted to a better spot.

From: thespruce