Got a niggling houseplant query? Our expert is here to help. This week’s tips on how to keep your aspidistra flying

What’s the problem?
I’ve had an aspidistra for about 30 years. It’s not dead, but it’s never thrived. I’d love it to look dark green and glossy with new leaves coming through.

Diagnosis
A lack of lush leaves suggests your plant may not be receiving enough light or its soil could be exhausted of nutrients. Infrequent fertilising or improper watering can slow its growth and leave it lacklustre.