Have Had My Tree Ferns For A Good 20 years. Have Always Had Large Healthy Fronds But All Of A Sudden They Are Producing Very Small Fronds.

Question

Do you know why and what can I do?

Answer 1

Have you ever fertilized the ferns? If not, try spraying the trunk and the soil with a liquid fertilizer each month.

Here are more care tips for tree ferns:
https://www.gardeningknowhow.com/ornamental/foliage/tree-ferns/planting-tree-ferns.htm