The rather drab yellow-green flowers are very attractive to bees and other pollinators. Other beneficial insects include parasitic wasps, bee fllies, and ladybugs.
Yellow giant hyssop spreads by rhizome. It can form colonies of plants that may reach 6 feet tall. It is a prime example of our "One-star" plants:
"One-star plants are often desired for their wildlife or plant community value, but not for the front yard. They are usually tall. It takes serious creativity to find a place for them in a formal situation." More information about our rating system can be found here: Ratings
Uses: Pollinators, deer resistant
Bloom time: July - September
Height: 4 to 6 feet
Space: 1 to 2 feet
Sun: Light sun to shade
Moisture: Average to moist
Seed: Sow outdoors November through January. Needs 6 to 8 weeks of cold-moist stratification.
- Seeds per packet: 200
- Seeds per ounce: 90,000
- 1 ounce per 3,000 square feet