Black-eyed Susan ‘Macau’

Rudbeckia triloba

Features

  • Medium producer
  • Pollinator-friendly

Description

Of all the black-eyed Susans I’ve ever grown, this is my absolute favorite. By midsummer, this variety can easily reach a towering height of up to 6 ft tall, with individual plants producing up to 25 stems each! The miniature-size flowers are borne in airy sprays, and when added to arrangements, they bring a happy, uplifting quality.

Details

Plant type: annual
Height: 5 to 6 ft
Site: full sun
Days to maturity: 90 to 100 days
Plant spacing: 9 in
Pinch: not necessary

Seed Sowing & Growing Notes

Start seed indoors in trays 8 to 10 weeks before last frost; transplant out after all danger of frost has passed.

Harvesting/Vase Life

Harvest when flowers are just beginning to open. Black-eyed Susans are notorious for making their water dark and murky overnight, even with floral preservative. To combat this, add a few drops of bleach to the water. Expect a vase life of 7 to 10 days.

Details

Description

Of all the black-eyed Susans I’ve ever grown, this is my absolute favorite. By midsummer, this variety can easily reach a towering height of up to 6 ft tall, with individual plants producing up to 25 stems each! The miniature-size flowers are borne in airy sprays, and when added to arrangements, they bring a happy, uplifting quality.

Details

Plant type: annual
Height: 5 to 6 ft
Site: full sun
Days to maturity: 90 to 100 days
Plant spacing: 9 in
Pinch: not necessary

Seed Sowing & Growing Notes

Start seed indoors in trays 8 to 10 weeks before last frost; transplant out after all danger of frost has passed.

Harvesting/Vase Life

Harvest when flowers are just beginning to open. Black-eyed Susans are notorious for making their water dark and murky overnight, even with floral preservative. To combat this, add a few drops of bleach to the water. Expect a vase life of 7 to 10 days.

Sources

How to Grow

Fall Mini Course

Learn how to successfully dig, divide & store dahlias for an abundance of blooms year after year

In our free, three-part video series, you’ll learn how and when to dig up your dahlia tuber clumps, how to divide dahlias to multiply your stock, and how to successfully store dahlias for an abundance of blooms year after year.