Asparagus Fern Tubers Under Jacaranda: Not Tree Rot

Bulb-like, fluid-filled structures near a jacaranda are almost certainly asparagus fern root tubers—storage organs, not a tree disease. Asparagus fern can be invasive and is toxic to dogs.

Removal

• Dig out as much root/tuber mass as possible.
• Monitor for regrowth; repeat removal.
• Consider confining asparagus fern to hanging baskets.

The tubers themselves don't kill other plants, but the fern's dense roots compete aggressively.