Q: Now that we've been spending so much time indoors, I've increased my collection of houseplants which is great for my mental health. However, some have developed unsightly brown tips and edges to the leaves. How can I prevent this?

A:  There are a lot of reasons this might happen: overwatering, underwatering, low humidity, drafts, too much fertilizer, high salt concentration in your tap water or a combination of some of these. First of all, find out what the preferred growing conditions for the plant are so you can narrow down the possible culprit(s). Then change one of the factors and see if the plant improves. If not, try the next possibility. Sometimes it's a hard slog to figure this out.