Rudbeckia triloba - Key Growing Information

Bouquet of Rudbeckia triloba, a prolific, easy to grow, dependable, and drought-tolerant flower crop.

DAYS TO GERMINATION:

7-10 days at 70-75°F (21-24°C). For best results prechill for 30 days

SOWING:

Transplant - Sow 5-7 weeks before planting out. Cover seed lightly (1/64"). For best results, prechill for 30 days: Place seedling flats outside or in the refrigerator and keep moist for 30 days. After chilling, move flats into a warm location until emergence. Direct seed - Gently press seed into soil as soon as soil can be worked in early spring or fall. Pinching not required. Reseeds.

LIGHT PREFERENCE:

Sun/Part Shade.

PLANT HEIGHT:

48-60".

PLANT SPACING:

18-24".

HARDINESS ZONES:

Zones 3-9.

VASE LIFE:

10-14 days. Newly opened flowers might wilt when first harvested but will rehydrate and correct. More mature blooms that have been open for a few days will be firmer at harvest.

HARVEST:

When blooms are completely open.

SOIL REQUIREMENTS:

Average soil. Drought tolerant once established.

USES:

Excellent cut flower, beds, and borders.

SCIENTIFIC NAME:

Rudbeckia triloba

ALTERNATE NAME:

Brown-eyed Susan

Rudbeckia (Black-Eyed Susan)