Coleus Overwintering Indoors: Moist Soil, No Fertilizer, Watch for Rot

Your Situation

Brought in pre-frost, potted in indoor mix + fertilizer spikes 1 month ago. Soil still moist. Low sun, fluorescent light.

Assessment

• If leaves look fresh/turgid: stop worrying. Low light = low water use.
• If droopy/leaf drop: too wet. Repot in fresh mix, drain, no water for days.

Winter Rules

• No fertilizer (spikes = salt buildup, forced weak growth). Remove them.
• Keep damp, not wet. Water from saucer only when dry.
• Min temp 45°F.
• Fluorescent light OK if that’s all you have.

Pro Tip

Coleus are annuals in most zones. Take tip cuttings now, root in water, pot up—fresh plants for spring. Parent may decline regardless.