Black-eyed Susan
Rudbeckia hirta
family
Asteraceae
Difficulty factors: Forgiving of beginner mistakes, Short time to harvest
duration
Perennial
growth habit
Forb
why learn this plant?
Black-eyed Susan teaches aesthetic garden design, deadheading techniques, and how to attract pollinators to your garden.
timeline
germination
7-14
days to maturity
90-120
growth stages
Germination/Establishment
1-2 weeks
Seeds swell and sprout, or transplants establish roots
Check in:
Look for first signs of green growth emerging from soil
Tasks:
- Keep soil consistently moist
- Maintain temperature
- Protect from strong wind
Watch for:
- Damping off from overwatering
- Poor germination from old seed
Seedling
2-4 weeks
True leaves develop, stem strengthens
Check in:
Count true leaves — ready for transplant at 2-4 sets
Tasks:
- Thin seedlings if direct-sown
- Begin light fertilizing
- Harden off if started indoors
Watch for:
- Leggy seedlings from insufficient light
- Transplant shock
Vegetative Growth
3-8 weeks
Rapid leaf and stem growth, plant fills out
Check in:
Plant should be growing visibly each week
Tasks:
- Regular watering
- Fertilize on schedule
- Add support if needed
- Watch for pests
Watch for:
- Nutrient deficiency (yellowing leaves)
- Pest damage
how to grow
starting method
either
sun requirements
Full sun
spacing
12-18 inches" × "12-18 inches"
planting depth
Surface
water needs
Frequency: Every 2-3 days
Amount: 1 inch per week
Method: Drip irrigation or soaker hose preferred. Water at base, avoid wetting leaves.
soil & fertilizer
Amend with compost. Preferred pH: 6.0-7.0. Soil type: Well-drained, fertile soil.
At planting: Balanced 10-10-10 or compost
During growth: Balanced fertilizer every 3-4 weeks every Every 2-4 weeks during growing season
zone timing guide
Best grown when temperatures are 60-80°F. Plant after last frost in spring.
Zone 3
Start indoors: April
Transplant: Late May-June
Short growing season, choose early varieties
Zone 4-5
Start indoors: March-April
Transplant: May-June
Direct sow: May
Zone 6-7
Start indoors: February-March
Transplant: April-May
Direct sow: April-May
Zone 8-9
Start indoors: January-February
Transplant: March-April
Direct sow: March
Zone 10+
Direct sow: February-March
Year-round growing possible
harvest guide
Visual cue
Mature size reached, typical color for variety. Harvest when black-eyed susan looks ready.
Feel
Firm but not hard. Should separate from plant easily.
Timing
Typically 90-120 days from planting
Storage
Store in cool location. Use within 1-2 weeks for best quality.
what can go wrong
Overwatering
Visual cue:
Yellowing lower leaves, mushy stems, mold on soil surface
Why it happens:
Too frequent watering without checking soil moisture
Prevention:
Check soil moisture before watering — stick finger 1 inch into soil
If it happens:
Allow soil to dry out between waterings. Improve drainage.
Insufficient light
Visual cue:
Leggy, stretched growth with pale leaves
Why it happens:
Planted in too much shade or crowded by other plants
Prevention:
Ensure at least 6-8 hours of direct sunlight
If it happens:
Transplant to sunnier location or thin surrounding plants
skill progression
skills required
- Basic soil preparation
what you'll learn
- General garden maintenance
- Observation skills
ready to grow Black-eyed Susan?
Join the waitlist for personalized growing guides, location-based timing, and community support.