127 gardener saves
Catalpa: the varieties gardeners actually grow
We track 3 varieties; these are the ones gardeners actually save and plant, ranked by real saves rather than catalog marketing. Each links to full care, bloom, and live price data.
The 3 most-saved Catalpa varieties
Of 3 in the catalog — ordered by how many gardeners actually grow them.
#1 most savedNorthern Catalpa
Catalpa speciosa
#2 most savedHeartland Catalpa
Catalpa speciosa 'Hiawatha 2'
#3 most savedPurple Leaf Catalpa
Catalpa erubescens 'Purpurea'
How to grow Catalpa
What the Catalpa varieties in our catalog actually agree on — drawn from the care records of the 3 most-grown of them, not from a generic template.
The Catalpa year
- PruneJanuary and February100% of varieties
Prune in late winter to remove deadwood and establish a strong framework.
- Check for PestsJune and July67% of varieties
Check for catalpa sphinx moth caterpillars, which can defoliate parts of the tree.
Do
- Give it plenty of room to grow to its large mature size.
- Water during extreme drought, but it is generally self-sufficient once established.
- Enjoy its unique, coarse texture and bold appearance in the landscape.
- Prune young trees to encourage a single, strong leader.
- Provide full sun for the deepest purple foliage.
Avoid
- Don't plant it in a small yard or close to buildings.
- Avoid planting over areas where you don't want flower, leaf, and pod drop.
- Don't top the tree, as this will ruin its structure and lead to weak regrowth.
- Don't worry about poor soil; it will likely thrive anyway.
What goes wrong with Catalpa
| Problem | What you'll see | What to do |
|---|---|---|
| Catalpa Sphinx Moth | Large green and black caterpillars (catalpa worms) that can completely defoliate the tree. | Often tolerated as the tree regrows leaves quickly. Hand-pick caterpillars (they are prized fish bait). Apply Bacillus thuringiensis (Bt) when caterpillars are small. |
| Verticillium Wilt | Sudden wilting and death of branches. | No cure. Prune out and destroy infected wood. Keep the tree healthy to help it resist the disease. |
| Powdery Mildew | White powdery coating on the large leaves in late summer. | Largely a cosmetic issue. Improve air circulation. Rake up fallen leaves. Fungicides are not practical on a large tree. |
Making more Catalpa
Seed
- Collect seed pods in fall after they have dried.
- Extract seeds and store them in a cool, dry place.
- Sow seeds outdoors in fall or stratify for 60 days before spring sowing.
- Germination is usually high and rapid.
Root Cuttings
- In late winter, take 4-6 inch sections of pencil-thick roots.
- Lay them horizontally in a tray of moist potting mix.
- Cover lightly with more mix and keep warm.
- Shoots should appear in several weeks.
Catalpa questions
How many types of Catalpa are there?
The Sow catalog tracks 3 distinct Catalpa varieties. The most popular — ranked by 127 real gardener saves — are shown first above.
What zones does Catalpa grow in?
Across its varieties, Catalpa covers USDA Zones 4–9. Individual varieties differ — each plant page lists its exact range, and Sow filters the catalog to your zone automatically.
When does Catalpa bloom?
Most Catalpa varieties bloom in late spring. Staggering early, mid, and late varieties extends the genus's season in one bed.
Which Catalpa should I choose?
Start from the most-saved varieties above — popularity across thousands of gardens is a strong signal of reliability — then filter by your zone and sun. In the Sow app you can preview any of them in a photo of your actual yard before you buy.
Keep exploring
Design with Catalpa in your own yard
Snap a photo of your space and see these varieties planted in it — sized correctly, matched to your zone, with care reminders included.
