underwatering and Boston Fern
Quick answer
If underwatering is what's going on with your Boston Fern, the most likely cause is: Boston ferns evolved as tropical understory plants with consistently moist soil and high humidity, so their fine fibrous roots cannot replace water lost through transpiration in the thin, delicate fronds when the potting medium dries out. As the root ball desiccates the plant drops whole fronds to conserve resources, leaving bare rhizomes and dry, crispy pinnae on the remaining crown.
Start here:
- 1. Water thoroughly when the top of the compost feels dry, pouring water over the soil until it drains freely from the bottom of the pot
- 2. Plunge the entire root ball into a sink full of room-temperature water for a thorough soaking and let it drain completely before returning it to the cover pot
Why underwatering happens to Boston Fern
Nephrolepis exaltata
Boston ferns evolved as tropical understory plants with consistently moist soil and high humidity, so their fine fibrous roots cannot replace water lost through transpiration in the thin, delicate fronds when the potting medium dries out. As the root ball desiccates the plant drops whole fronds to conserve resources, leaving bare rhizomes and dry, crispy pinnae on the remaining crown.
How to correct underwatering on Boston Fern
- 1
Water thoroughly when the top of the compost feels dry, pouring water over the soil until it drains freely from the bottom of the pot
- 2
Plunge the entire root ball into a sink full of room-temperature water for a thorough soaking and let it drain completely before returning it to the cover pot
- 3
Trim any fully crispy or collapsed fronds at the base with sterile shears so the plant redirects energy into fresh fiddlehead growth
Keep underwatering from repeating on this Boston Fern
Push a finger below the compost surface every few days and water as soon as the surface feels dry, never letting the root ball dry out completely between waterings; group with other humidity-loving plants or use self-watering pots to stabilize moisture.