Golden Rain Tree, Golden Raintree, Panicled Goldenraintree 'September'

Koelreuteria paniculata

Family: Sapindaceae (sap-in-DAY-see-ee) (Info)
Genus: Koelreuteria (keel-roo-TER-ee-uh) (Info)
Species: paniculata (pan-ick-yoo-LAY-tuh) (Info)
Cultivar: September



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


over 40 ft. (12 m)


20-30 ft. (6-9 m)


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)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Full Sun


Unknown - Tell us

Bloom Color:

Bright Yellow

Bloom Time:

Mid Summer

Late Summer/Early Fall



Other details:

May be a noxious weed or invasive

Soil pH requirements:

Unknown - Tell us

Patent Information:

Unknown - Tell us

Propagation Methods:

From seed; direct sow outdoors in fall

From seed; stratify if sowing indoors

From seed; direct sow after last frost

From seed; germinate in a damp paper towel

From seed; germinate in vitro in gelatin, agar or other medium

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds

Properly cleaned, seed can be successfully stored


This plant has been said to grow in the following regions:


Malvern, Arkansas

Irvine, California

Titusville, Florida

Terre Haute, Indiana

Versailles, Kentucky

Ethel, Louisiana

Roslindale, Massachusetts

Saint Louis, Missouri

Cincinnati, Ohio

Baytown, Texas

Ridgefield, Washington

show all

Gardeners' Notes:


On Apr 2, 2014, coriaceous from ROSLINDALE, MA wrote:

'September' blooms in late August and early September in Boston Z6a. Its immature seed capsules are green, like the species.

The Arnold Arboretum's plant introduction program mistakenly distributed some 'Rose Lantern' (which has ornamental pink immature capsules) to growers believing it was 'September'.

Both cultivars are aggressive self-sowers like the species. If you take into account the time spent removing seedlings, these are not low-maintenance trees. I suspect that in time they may also prove... read more


On Sep 1, 2013, Weerobin from Saint Louis, MO (Zone 6a) wrote:

It's nice having a plant bloom this time of year.
I haven't had problems with unwanted seedlings.


On Oct 1, 2012, joebobone from Titusville, FL wrote:

My first house that I ever bought here in central Fl. had two full grown rain trees in the front yard, that was in 1979. I built a house a few years later in 1986 and the first thing I planted was 3 golden rain trees across the front yard. So with that said I do believe that not many other people can say they have been dealing with them for as long as I have. I love the trees, there are alot of people that can not stand them at all and will cut them down in a heart beat. For the ones that hate the tree I can understand why, I have never seen a more messy tree in my life, from the begining of Sept. until the tree is finished sheding anything that is growing on it which does not take long as long as there is a good week of cold weather or at least cooler. But until it is done sheding be awar... read more


On Sep 10, 2012, Western13 from Irvine, CA wrote:

I do not personally grow this tree but my neighbor has one and it is very invasive. Every seed is fertile and the Santa Ana winds here in Irvine CA. blow the pods everwhere. You can find them in your containers and lawn and any ground they land on. They stay fertile and sprout all year long,

They are a major nusiance but can be pulled up easily when young. They are a bigger problem where other homeowners ignore the seedings and they grow into a grove in another yard.

Only good in cold winter climes


On Jun 6, 2011, Nana444 from Versailles, KY wrote:

Although I love the shape and size, and it gives what I call muted shade - meaning not total, I hate that there are thousands of seeds produced at the end of the summer. They grow anywhere and everywhere! The bees and butterflies love it when the flowers are blooming and the color is great and it grew fast. I find myself in the spring picking up little trees from all over the yard, my neighbors yards, in piles of leaves. If it came in a variety that did not produce the seeds I would buy another in a heartbeat!! I was told there is one but who knows?