Black Dragon Coleus - Care Sheet

Overview

Black Dragon Coleus brings dramatic colour to windowsills and shaded summer containers. Its deeply serrated, textured leaves have rich red centres and purplish-black edges. Botanically, it is Coleus scutellarioides 'Black Dragon'; labels may still use the older name Solenostemon scutellarioides. Expect a compact mound roughly 30–36 cm / 12–14 in tall under good conditions.

This beginner-friendly tropical perennial is often grown outdoors as a summer annual. Indoors, bright light, steady moisture and occasional pinching help keep it attractive. Its main weakness is cold: protect it well before frost arrives.

Quick Facts

Light

Choose a bright position with filtered daylight indoors. An east-facing window is a useful starting point. Outdoors, give Black Dragon partial shade or gentle morning sun with afternoon protection. Its breeder recommends shade or partial sun, so avoid assuming it tolerates the intense exposure suited to some newer coleus varieties. Introduce brighter conditions gradually and watch for bleaching or crispy patches.

Water

Aim for evenly moist roots without waterlogging. Check the potting mix with a finger and water when the surface begins to dry, while moisture remains underneath. Water thoroughly until excess drains out, then empty the saucer. Hot outdoor pots may need daily checks; indoor plants usually dry more slowly. Let conditions guide you rather than following a fixed weekly schedule. Avoid repeatedly allowing the whole root ball to dry out.

Humidity

Moderate household humidity usually suits coleus. Around 40–60% is a practical general houseplant target, rather than a verified Black Dragon requirement. Keep it away from drying heater vents. If the air is very dry, a humidifier can help, but maintain airflow around the foliage. Routine misting provides only brief humidity increases and can leave leaves unnecessarily wet.

Temperature

Keep plants comfortably warm, preferably around 18–24°C / 65–75°F. The breeder's production guidance uses warm days and slightly cooler nights within this range. Avoid cold draughts and contact with chilly window glass. Bring outdoor plants inside before nights fall below approximately 10°C / 50°F. Plant out only after frost risk has passed and the soil has warmed above about 16°C / 60°F.

Soil & Potting

Use a good-quality container mix that holds moisture while allowing excess water to escape. A peat-free houseplant mix with added perlite is a practical option if the original mix feels dense. Always choose a container with drainage holes. Avoid compacted garden soil in indoor pots, and plant at the existing depth rather than burying the soft stems.

Feeding

During active spring and summer growth, apply a balanced liquid fertilizer about once a month. Follow the product's container-plant instructions; start conservatively because coleus can be sensitive to accumulated fertilizer salts. If the potting mix already contains fertilizer, allow for that before feeding. Reduce or pause feeding when winter light levels slow growth, and avoid fertilizing a wilted plant with dry roots.

Repotting

Check the roots each spring and whenever the pot starts drying unusually quickly. Repot if roots densely circle the root ball or crowd the drainage holes. An annual check is more useful than an automatic annual pot change; vigorous young plants may need attention sooner. Move up just one pot size, refresh the mix and water gently. Avoid placing a small root system in a large volume of wet compost.

Propagation

Stem cuttings are the simplest way to preserve your plant's appearance.

1. Take a healthy, non-flowering tip 10–15 cm / 4–6 in long, cutting below a leaf joint.
2. Remove the lower leaves and place the exposed joints in water or moist propagation mix.
3. Keep warm in bright indirect light. Refresh the water regularly or keep the mix lightly moist.
4. Roots commonly develop within two to three weeks. Pot water-rooted cuttings once roots have formed.

Black Dragon is also sold as seed. Use labelled commercial seed and follow its sowing directions; seed collected from your own plants may produce variable offspring.

Common Problems

Wilting

Check moisture first. Dry roots need thorough watering; wet roots need better drainage and a pause in watering. If wilting occurs in hot afternoon sun despite moist soil, provide more shade.

Yellow leaves and soft stems

Persistently wet mix can damage roots. Empty standing water and check drainage. If roots are brown and mushy, trim damaged portions and repot into fresh mix. Take healthy tip cuttings if the base is deteriorating.

Long, sparse growth

Increase light gradually and pinch growing tips just above a leaf joint to encourage branching. Remove flower spikes if foliage is your priority.

Small pests on foliage

Aphids, whiteflies and spider mites can affect indoor coleus. Isolate the plant, inspect leaf undersides and rinse away pests. For persistent infestations, use a product labelled for indoor ornamental plants, following its directions.

Toxicity & Pet Safety

Keep Black Dragon away from pets that chew plants. Cultivar-specific pet safety is not established by the sources consulted. The ASPCA's toxic “Coleus” entry concerns Indian borage, a different species, so it cannot directly prove Black Dragon's toxicity. NC State flags ornamental Coleus scutellarioides for possible skin irritation in people. Avoid ingestion, wash hands after handling and contact a veterinarian if a pet eats it.

Seasonal Care

In spring, trim stretched growth and gradually acclimatize plants before moving them outdoors. During summer, monitor container moisture closely. In autumn, inspect for pests before bringing plants inside, and consider taking cuttings as a compact backup. Over winter, provide your brightest suitable position, water less frequently as growth slows and keep the plant warm.

Quick Tips

• Give bright light with protection from harsh afternoon sun.
• Check moisture before watering.
• Empty saucers after excess water drains.
• Pinch tips regularly for fuller growth.
• Remove flower spikes to favour foliage.
• Take cuttings before autumn cold arrives.