Spittlebugs: Frothy Masses on Stems—Wash Off, Pick Off, or Spray Soap

White froth on penstemon (and grass, pine tips) = spittlebug nymphs. Suck sap, excrete bubbles for protection.

Control

• Wash off with hose.
• Pick off and squish.
• Insecticidal soap.

Common, minor, easy to manage.