Red Head Coleus - Care Sheet

Overview

Red Head coleus, usually sold as Redhead, brings rich red foliage to pots, summer borders and bright indoor spaces. Its botanical name is Coleus scutellarioides; Redhead is the cultivar marketed under the selection name ‘UF0646’. Older labels may use Solenostemon or Plectranthus.

This vigorous, bushy tropical perennial is commonly grown as a summer annual where winters are cold. Outdoors, it can reach roughly 45–90 cm / 18–36 inches tall. It is beginner-friendly when given steady moisture, good drainage and protection from cold.

Quick Facts

Light

Indoors, choose a bright window with filtered light. Outdoors, Redhead tolerates more sun than many traditional coleus varieties. Morning sun with afternoon shade is a forgiving starting point, especially in hot climates. Introduce stronger sunshine gradually. Deep shade can produce stretched stems, while sudden intense sun may bleach or scorch leaves.

Water

Check the soil with a finger and water when the top 2–3 cm / about 1 inch feels dry. Soak the root ball thoroughly, let excess water drain, and empty the saucer. Avoid letting the whole pot dry out or remain waterlogged.

Outdoor containers may need checking daily during hot, windy weather. Water at soil level rather than repeatedly wetting leaves. Reduce watering as growth slows indoors during winter.

Humidity

Moderate indoor humidity generally suits coleus; a tightly controlled percentage is unnecessary. Keep it away from radiators and drying air vents. If the room is persistently dry, a humidifier can help. Maintain gentle airflow and avoid keeping foliage continually wet, which encourages disease.

Temperature

A practical growing range is approximately 18–29°C / 65–85°F, with cooler nights acceptable provided the plant stays comfortably warm. Keep indoor plants above about 15°C / 59°F and away from cold drafts. Plant outdoors after frost risk has passed and temperatures are reliably above approximately 16°C / 60°F. Frost kills coleus.

Soil & Potting

Use a good-quality, peat-free container compost that holds moisture while allowing excess water to escape. A loam-based mix is suitable indoors; add perlite if the mix stays heavy and wet. Always choose a pot with drainage holes.

For garden planting, improve soil with well-rotted organic matter. Set the root ball at its original depth and choose a sheltered position with moist, well-drained soil.

Feeding

During spring and summer, feed container plants about once a month with a balanced, water-soluble fertilizer at the label rate. If compost already contains fertilizer, account for that before adding more. Alternatively, use a slow-release product as directed. Reduce or stop feeding when winter light and growth decline; fertilizer cannot compensate for insufficient light.

Repotting

Repot an overwintered plant in spring, usually once a year. Move it sooner if roots fill the container, emerge through drainage holes, or the compost dries unusually quickly. Choose a pot only slightly larger, refresh the compost and water thoroughly. A much larger pot can retain excess moisture around a small root system.

Propagation

Softwood stem cuttings preserve Redhead’s foliage characteristics, whereas seedlings may differ. This cultivar has been listed as patented, so check current propagation restrictions before multiplying it.

Where permitted, take a healthy, nonflowering tip approximately 8–10 cm / 3–4 inches long. Cut below a leaf node, remove lower leaves and insert the bare node into moist propagation compost. Keep warm in bright filtered light, with increased humidity and some ventilation. Pot on once roots develop and fresh growth appears.

Common Problems

Wilting

Check the compost before watering. Dry soil calls for a thorough soak. If soil is already wet, investigate poor drainage or damaged roots instead. Afternoon wilting in strong sun may improve with shade.

Yellow or muddy-brown leaves

Persistent wetness can damage roots. Empty standing water, check drainage holes and allow the surface to dry between waterings. Remove rotten roots and replace sodden compost if necessary.

Leggy growth or weak colour

Move the plant into brighter light gradually. Pinch growing tips just above a leaf pair to encourage branching. Remove flower spikes if a compact foliage display is your priority.

Sticky leaves or visible insects

Inspect leaf undersides and stems for aphids, whiteflies, mealybugs and scale. Isolate affected indoor plants. Remove small infestations manually or use a product labelled for the pest and ornamental plants, following its directions.

Toxicity & Pet Safety

Keep Red Head coleus away from pets. Ornamental coleus is not intended for animal consumption, and its sap can irritate sensitive skin. Toxicity listings require care: the ASPCA entry called “Coleus” identifies Indian borage, a different species, so its symptom list should not be applied directly to Redhead. Cultivar-specific evidence is limited. If a pet eats this plant, contact a veterinarian with the plant’s identity.

Seasonal Care

In spring, refresh compost and gradually acclimate plants to outdoor conditions. Through summer, monitor container moisture and pinch tips for bushiness. Before autumn chills, bring plants into a bright, warm position and inspect for pests. During winter, water less often and expect slower growth.

Quick Tips

• Check soil moisture instead of following a fixed watering calendar.
• Introduce direct sun gradually.
• Use drainage holes and empty saucers.
• Pinch tips for fuller growth.
• Protect plants from frost and cold drafts.
• Keep foliage and fallen leaves away from pets.