Rudbeckia

Rudbeckia

Rudbeckia

Plant out 1 week before your last spring frost. Space plants 12 in (30 cm) apart.

Photo: Dominicus Johannes Bergsma, CC BY-SA 4.0 · source

When to plant

Timed from your frost dates, so it holds wherever you garden. Give yours and every step below becomes a date.

See the dates for your garden

Enter your average last spring frost and first fall frost. Every timing on this site turns into a calendar date. Not sure of yours? Your local extension service or a search for “last frost date” and your town will tell you; the app finds them from your location.

Last spring frost
First fall frost

Saved in this browser only. Nothing is sent anywhere.

Optimal Transplant from Nursery Stock

From a plantRecommended from a plant
  1. Plant out1 week before your last spring frost
  2. First harvestabout 60 days after planting out

Optimal Indoor Start

From seedRecommended from seed
  1. Start indoors9 weeks before your last spring frost
  2. Begin hardening off2 weeks before your last spring frost
  3. Plant out1 week before your last spring frost
  4. First harvestabout 120 days after sowing

Optimal Transplant

From seed
  1. Plant out1 week before your last spring frost
  2. First harvestabout 120 days after planting out

Optimal Direct Sow

From seed
  1. Sow outdoors2 weeks before your last spring frost
  2. First harvestabout 110 days after sowing

Optimal Dormant Fall Sow

From seed
  1. Sow outdoors3 weeks after your first fall frost
  2. First harvestabout 75 days after next spring's last frost

Growing rudbeckia

Spacing in the row
12 in (30 cm)
Between rows
24 in (61 cm)
Planting depth
1/8 inch or surface sow
Sun
Full Sun
Soil
Well-drained, adaptable, pH balanced
Germination
7-30 days at 65-75°F
Harvest season
Summer to Fall
Mature height
18-84 inches
Support
Stake taller varieties.
Hardy to
USDA zone 3
Life cycle
Perennial (many species), Annual (some species/cultivars), Biennial (some species)

Sow shallowly; light aids germination. Maintain consistent moisture.

Watering. Moderate, consistent moisture until established; then tolerant of drought.

Neighbours

The companion chart →

Grows well beside

Feeding

Seedlings
Light balanced liquid fertilizer once true leaves emerge.
Growing
Balanced granular or liquid fertilizer if soil is poor; generally not heavy feeders.
Flowering and fruiting
Typically not required if soil is fertile.
How often
Once a year, in early spring, for established perennials. Seedlings as needed.
Note
Avoid over-fertilizing to prevent leggy growth and promote robust blooms.

Your rudbeckia, planned to the day.

Canopy turns these timings into dates from your own frost data, places every plant at its spacing on your garden map, and tracks it all the way to harvest.

Add rudbeckia to your planting calendar →

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