How can I tell if this fern is still alive?

Look closely at the crown, the point where the fronds emerge. Any firm green tissue or new curled fronds are encouraging signs, even if most of the older foliage is brown. If the crown is dry and completely dead-looking, recovery is less likely, but a stressed fern can look worse than it is.

Remove only fronds that are clearly dead, then adjust care gradually. The right setup depends on the kind of fern, so a photo or ID would help with more specific advice.

If it’s an indoor fern, I’d start with light and watering, not fertilizer. Keep it out of harsh direct sun and check the soil before watering. Ferns generally like consistent moisture, but sitting in water can cause trouble, so use a pot with drainage and don’t let it stay waterlogged.

Give it a little time after changing conditions. New growth is a better sign of recovery than whether the old fronds look nice again.

For a garden fern, dryness and a rough-looking patch don’t automatically mean it’s dead. Water the soil well and, if it’s a tree fern, water the crown and trunk too. Keep it shaded or partly shaded while it’s struggling, and pull out any climbing weed that’s growing through it.

If there are stones packed right around the base, clearing some space and using a light mulch may help the area hold moisture more evenly. Avoid making the ground soggy.