Northern Catalpa
Catalpa speciosa
Family Bignoniaceae
Northern catalpa blooms like an orchid tree that wandered into the Midwest — big clusters of frilled white flowers over dinner-plate leaves in early summer, worked hard by bees and hummingbirds. Then come the long dangling bean pods, hanging like ornaments from a fast-growing native.
This is a tree for hard places and big gestures — wet or dry, hot or cold, poor soil, it simply grows, and fast. It drops leaves, blooms, and pods, so give it room away from patios. Old-timers prize its caterpillars as catfish bait. Plant it where bold works.
Full Sun
Low water
Fast growth
Native to North America
Attracts hummingbirds
Attracts butterflies
Attracts bees
From the print shop
Growing northern catalpa? Hang it.
Our Plant Library collection carries northern catalpa — Catalpa speciosa, print Nº 96, “Northern Catalpa.”
526 designsfrom $12.99white or black backgroundmatte poster, unframed
Will it fruit where you are?
Enter your ZIP — we look up your USDA hardiness zone (2023 map) and check it against what northern catalpa actually needs.
Hardy inZones 4-8Northern Catalpa · Common problems
Common northern catalpa problems
Pests
1 problem on file
- Catalpa Sphinx (the 'catalpa worm' — defoliates but the tree recovers; anglers harvest them)
Diseases
3 problems on file
- Almost none serious
- Verticillium Wilt
- Bacterial Leaf Scorch
Northern Catalpa · Growing & propagation
Growing northern catalpa
- Light
- Full Sun
- Water
- Low-Moderate
Very adaptable and tough
Soil- Any, wet or dry · pH 5.5 - 8.0
Fertilizer- None
Pruning- Winter
A bold, fast native shade tree with huge heart-shaped leaves, tropical-looking clusters of orchid-like white flowers in early summer (bees and hummingbirds love them), and long dangling 'bean' pods. Tough as nails — takes wet or dry, hot or cold, poor soil. It's coarse and drops flowers, leaves, and pods (a little messy), so site it as a bold specimen with room, not over a patio. The catalpa worm is famous fish bait.
Spacing- 40+ ft
How to plant & propagate northern catalpa
- Propagate
- Seed (stratify), cuttings, or layering
Northern Catalpa · Calculators & field guides
A little help in the garden.
Northern Catalpa · Yearly calendar
The northern catalpa year, month by month
Jan
PruneDecember to February
BloomPruneBloomMay to June
PruneDecember to February
What each band means
- Bloom — flowers open — pollinators working, frost on blossoms is the danger.
- Prune — shape it now — cuts heal cleanly and structure is visible.
These are the species' typical months — expect them a few weeks earlier in warm zones and later in cold ones. Watch the plant, not just the calendar.
Northern Catalpa · Ecology & uses
Ecology & uses
Catalpa speciosa
Northern Catalpa in the garden system
- Canopy layer tree
- Nectary/insectary
- Hosts Catalpa sphinx moth (famous catfish bait)
- Attracts
- Hummingbirds, Butterflies, Bees
Moisture- Upland / dry
Deer- Browsed
Protect young plants
- Origin
- Native to North America
What northern catalpa is grown for
! Some parts toxic — see notesPods/seeds not for eating; foliage safe
Use- Fast native shade
- Use
- Bold specimen
- Use
- Pollinators
- Use
- Tough sites
Harvesting & storing northern catalpa
Long bean-like seed pods (ornamental, not edible).
Edibility, identification, and traditional-use notes here are general reference — not medical or veterinary advice, and not a claim that any plant treats or prevents anything. Medicinal ratings record how strongly a plant features in herbal tradition, nothing more. Never eat or dose a plant you have not positively identified. More on how to use this library.
Northern Catalpa · Varieties & cultivars
Choosing a northern catalpa variety
Northern C. speciosa (hardier, better form); Southern C. bignonioides ('Nana' = dwarf umbrella catalpa)
Sources & plant identity
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Northern Catalpa
Catalpa speciosa
The plant, at a glance.
- Botanical name
- Catalpa speciosa
- Plant family
- Bignoniaceae
- Growth habit
- Tree · Perennial
- Origin
- Native to North America
- USDA plant symbol
- CASP8
- Invasive risk
- Low
Hardiness, size and timing vary with your cultivar, soil and climate.
Rooted in research.
University extension research, brought together with hands-on growing experience at Story Thyme Farms.
Where to buy
Third-party nurseries — not Story Thyme Farms.
Third-party nurseries, not Story Thyme Farms. Prices are theirs.
Story Thyme Farms may earn a small commission from these links, at no cost to you — it never changes what we recommend.
Questions
Northern Catalpa questions, answered straight.
Is northern catalpa safe for kids and pets?
With care. Pods/seeds not for eating; foliage safe Site it accordingly if children or pets roam the garden. This is general reference, not medical or veterinary advice — call a vet or poison control if something has actually been eaten.
When do you harvest northern catalpa?
Long bean-like seed pods (ornamental, not edible).
How do you propagate northern catalpa?
Seed (stratify), cuttings, or layering.
Elsewhere
Where northern catalpa sits in the library.
Black Locust
Sassafras
Eastern Hemlock
American Sycamore