What's eating my royal purple lilyturf?

Royal Purple Lilyturf indoors faces the same core houseplant pests as other Liriope: spider mites in dry air, mealybugs sheltering in the dense rosette, and scale on stems. Its dark purple flower spikes can also attract fungus gnats in overly wet compost. Spider mites are the most frequently encountered problem in indoor cultivation.

Pale, speckled or bronzed leaf surface; fine webbing between leaf blades; plant loses its deep colour and vigour Mist the foliage to raise humidity; wipe leaves with a damp cloth; apply insecticidal soap or neem oil; repeat every 5-7 days for 3-4 weeks

White cottony deposits in the rosette centre and at leaf axils; honeydew makes leaves sticky; growth slows Dab each colony with a cotton swab dipped in rubbing alcohol; follow up with a neem oil spray to the whole plant; quarantine from other houseplants

Adult gnats hover around the pot; larvae in wet compost chew fine roots, causing wilting and yellowing, especially in seedlings Allow the top 2 inches of compost to dry between waterings; apply a BTi drench (Bacillus thuringiensis israelensis); use yellow sticky traps to monitor adults