Height: 8-10 ft. (2.4-3 m) 10-12 ft. (3-3.6 m) 12-15 ft. (3.6-4.7 m) 15-20 ft. (4.7-6 m) 20-30 ft. (6-9 m)
Spacing: 15-20 ft. (4.7-6 m)
Hardiness: 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) USDA Zone 10a: to -1.1 °C (30 °F) USDA Zone 10b: to 1.7 °C (35 °F) USDA Zone 11: above 4.5 °C (40 °F)
Sun Exposure: Full Sun
Danger: Plant has spines or sharp edges; use extreme caution when handling
Bloom Color: Bright Yellow
Bloom Time: Late Spring/Early Summer
Other details: May be a noxious weed or invasive This plant is attractive to bees, butterflies and/or birds Flowers are fragrant Drought-tolerant; suitable for xeriscaping This plant may be considered a protected species; check before digging or gathering seeds
Soil pH requirements: 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline)
Patent Information: Non-patented
Propagation Methods: From seed; sow indoors before last frost From seed; direct sow after last frost
Seed Collecting: Allow seedheads to dry on plants; remove and collect seeds
I have chosen to stay neutral, since I have just planted my Jerusalem thorn yesterday. I rescued the 4' tree from an area that was getting ready to be paved for a new road. I have transplanted the tree in my backyard away from traffic but can be seen from the bay window or patio. It will look cool, when it starts to grow since it is place next to a dry river bed that leads to my 3,000 sq ft pond. I see it requires a lot of maintenance, but thats OK since I enjoy the pleasure of doing yard work. Living in Maricopa, AZ it's best to keep landscape as if it would be in the wild.
On Feb 27, 2009, chuck7701 from McKinney, TX (Zone 8a) wrote:
Some may consider these nice in your yard, but I consider them to be an invasive and nuisance species. In the countryside they grow and spread rapidly by seed, are terrible to deal with. A fast grower with very sharp thorns. Also very messy, constantly sheds something. Not recommended.
They have little aesthetic value in my opinion, and zero agricultural value. Will quickly take over an area once an established plant drops seed, and forms thickets. We have to continually shred or spray to kill them in the pastures and around stock tanks to attempt to control them. Will grow in dry or wet soil.
On Sep 13, 2008, kdaustin from Austin, TX (Zone 8b) wrote:
Very pretty in or out of bloom with bright green wispy foliage. The flowers are a bright yellow and add great color in the hottest part of summer. No or very little water once established in my area of the country. Yes its thorny, though the mature trunk is not and if limbed up and carefully placed its no big deal, mine is about 4' away from a path, and noone has gotten stuck yet. Messy? I don't think so but thats relative. I have people tell me their oaks, elms, whatever are messy all the time at work. Not used a lot in my area, even though it grows wild here, however I have people bring in pieces all of the time to identify because they find it so attractive.
On Jun 11, 2004, Xenomorf from Valley of the Sun, AZ (Zone 9b) wrote:
A comparison between the flowers of five Palo Trees
--The Mexican Palo Verde (Parkinsonia aculeata), the upper petal starts out with red dots that eventually grow bigger and turn the entire top petal to red.
--The Palo Brea (Parkinsonia praecox), the upper petal has smaller & fewer red dots than the Mexican Palo Verde (P. aculeata) that don't grow bigger.
--The Blue Palo Verde (Parkinsonia florida), the upper petal is always a solid yellow just like the other four petals.
--The Little Leaf Palo Verde (parkinsonia microphylla), the upper petal is solid, all white, and the remaining petals are yellow.
--The Palo Brasil (Haematoxylum brasiletto), has flowers similar to Parkinsonia sp., and the top yellow petal has red dendritic streaks.
On Nov 8, 2003, TerriFlorida from Plant City, FL wrote:
In 1991 at a friend's newly purchased house, I rescued what I later learned was Jerusalem thorn. Some not so smart person had planted it a foot from the foundation, in full shade. It was a 6' stick of thorns, with a little ruff of leaves at the top! My friend is no gardener, so I took it home, CAREFULLY!
I planted it in full sun, on a mound of dirt. Well, 'dirt,' that's kindly put. Florida's native soil is generally nearly pure sand in many places. Nevertheless, this tough stick grew, and leafed, and flowered, and grew, and flowered again... I was very sad to leave it when we moved 40 miles away, but there was no way any of us was going to deal with moving this now very bonsai-ish 15' x 15' tree.
This is definitely a tree for a specific kind of site. You want to give it full sun, and really well drained not great soil. You want to give it room, for your own safety. Those thorns are serious. And you want to put it where it can be seen, because when it's in bloom, it is really beautiful. Down here it blooms twice a year -- rare in trees. I guess you don't want to put it near where you want neatness. I never noticed its messiness, but I put it where that didn't matter. That was just good luck, mind you. I knew nothing about it when I planted it other than it was going to be thorny.
On Sep 3, 2003, Greenknee from Chantilly, VA (Zone 6b) wrote:
This is one of the signature plants of the sonoran desert - Arizona, Mexico and small parts of California. It responds to moisture by growing a set of leaves when ever moisture levels are high enough. The green trunk and branches take care of photosynthesis the rest of the time! Lives alongside ocotillo, boojum trees, cholla cactus, etc, though maybe not quite as tough as they are.
On Aug 1, 2003, KactusKathi from Goodyear, AZ (Zone 9a) wrote:
I love the green trunk and the wispy leaves, but it drops them all year long! I am constantly cleaning up after this tree, bags and bags of trash!
This plant has been said to grow in the following regions:
, Catalina Foothills, Arizona Goodyear, Arizona Maricopa, Arizona Phoenix, Arizona (2 reports) Tucson, Arizona Clovis, California Manhattan Beach, California Menifee, California Ontario, California Poway, California San Leandro, California Tulare, California Wildomar, California Boyette, Florida Fort Pierce, Florida Jacksonville, Florida (2 reports) Oldsmar, Florida Pembroke Pines, Florida Port Saint Lucie, Florida Natchez, Mississippi Roswell, New Mexico Centerville, South Carolina Austin, Texas (3 reports) Brownsville, Texas Dalworthington Gardens, Texas Kendalia, Texas La Vernia, Texas Olmos Park, Texas San Antonio, Texas (2 reports) Santa Fe, Texas