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Hardiness: USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F)
Sun Exposure: Sun to Partial Shade
Danger: Parts of plant are poisonous if ingested
Bloom Color: Pale Pink White/Near White
Bloom Time: Late Spring/Early Summer Mid Summer
Foliage: Deciduous
Other details: Average Water Needs; Water regularly; do not overwater
Soil pH requirements: 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline)
On Mar 16, 2007, Bledsoe from Fort Collins, CO wrote:
I would argue with some of the people who have said negative things about this tree. It's an absolutely beautiful sight to see it in bloom. Here in colorado sometimes trees are limited that will grow with such sucess and this one. The leaves are rather large and fun to look at.
On Jan 8, 2007, masonesker from Lansing, MI wrote:
The Catalpa is a very worthwhile choice to grow. I do not know if this is a native tree to Lansing, Michigan, but I do know from the book Michigan Trees by Otis that is is a naturalized species here in the Grand River Valley. Old specimans are often found in this area in graveyards and around fine old homes. While it does not seem to be very popular here anymore I would recommend it to anyone who wants an unusual, fast growing shade tree. When in bloom this tree has an ethereal beauty that can not be matched. The large, heart shaped leaves seem more like they belong in a rain forest than in Michigan. The one I planted does fine on a slightly shaded hill with dry sand/clay soil. I would argue that they do live for over 100 years; in rich moist soil they grow over 70 ft. in this region. Note: While this is a great lawn tree it is not for the anal as the large seed pods can create a mess. Much like most things in life it is a trade off. No more trouble than a Black Walnut or a Sycamore. Kids like the leaves and the birds seem drawn to this fine tree- well worth planting and easily grown from seed.
On Mar 28, 2006, JamesCO from Grand Junction, CO (Zone 7a) wrote:
This tree has its place. Out of place, it is a menace.
Very attractive trees can be grown from seed and will outpace an expensive large container-grown plant. Full size in 10 years. Fast growth makes it a mildly brittle-stemmed plant, but heat/drought/soil tolerances with very unusual texture make it worthwhile in certain places. (Good to even 8.0 pH) Do not plant where the large leaf litter or rigid-dried-pod-litter will be a problem. Seedlings are not difficult to kill by mowing.
This tree is the highlight of our early summer, The blossoms are very aromatic and wonderful, The leaf provides great shade for our hot Utah summers. This tree is very hardy and bug/disease resistant. Fast/Medium grower. In fall this tree will usually drop it's leaves within a weeks period of time and usually after a consistant period of hard frost. This makes leaf clean up a rather short period of time. The pods can be a pain but with a good bagging mower this is a non-issue for us. No special watering is required for this tree which makes it essentially care free once established. This is the only tree I would consider a must for any yard we have.
On Oct 21, 2003, gold_thumb from Dunstable, MA wrote:
The large heart-shaped leaves and irregular branching are an obnoxious contrast to the northern landscape. The most interest the tree provides is when its in bloom with large flowers that remind me of Rhododendron catawbiense 'Album' as the flowers are white with a clear violet-blue throat. I can't believe nurseries used to sell this!!! In the tree's defense, it is a strong fast growing tree but for ornamental purposes its simply not worth digging the hole.
On Jul 31, 2002, smiln32 from Oklahoma City, OK (Zone 7a) wrote:
Fast grower and transplants easily. Prone to powdery mildew, though.
Regional...
This plant has been said to grow in the following regions:
Greensboro, Alabama Jones, Alabama Morrilton, Arkansas Merced, California Clifton, Colorado Fort Collins, Colorado Savannah, Georgia Chicago, Illinois Denison, Iowa Dunstable, Massachusetts Lansing, Michigan Eveleth, Minnesota Neptune, New Jersey Jefferson, New York Columbia Station, Ohio Sandusky, Ohio Rochester, Pennsylvania Sayre, Pennsylvania West Newton, Pennsylvania Conway, South Carolina Provo, Utah Spokane, Washington