Height: 4-6 ft. (1.2-1.8 m) 6-8 ft. (1.8-2.4 m) 8-10 ft. (2.4-3 m)
Spacing: 36-48 in. (90-120 cm)
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) 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)
Sun Exposure: Full Sun
Bloom Color: Bright Yellow
Bloom Time: Mid Fall
Foliage: Herbaceous Blue-Green Smooth-Textured
Other details: This plant is attractive to bees, butterflies and/or birds Average Water Needs; Water regularly; do not overwater Self-sows freely; deadhead if you do not want volunteer seedlings next season This plant is resistant to deer
Soil pH requirements: 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline)
Patent Information: Non-patented
Propagation Methods: From seed; direct sow after last frost
Seed Collecting: Allow seedheads to dry on plants; remove and collect seeds
On Jan 19, 2013, strange2u from Hinsdale, IL wrote:
I am looking for native plants that deer like to eat regularly and naturally, and no, I'm not a hunter. I'm looking for native plants that deer prefer to eat, in an attempt to distract them from, eating from other gardens grown for human pleasures.
I read that this sunflower is a natural food source for deer, but DG's profile for this plant says it is deer resistant. Now, one of these sources is incorrect. Is there anyone who has grown this sunflower, that can varify if deer like to eat this plant, or not.
On Oct 30, 2011, shindagger from Oklahoma City, OK wrote:
I just pulled three long rooted starts easily out of a wet ditch. I notice they were growing in pure red sticky clay, the kind that dries as hard as bricks in summer. The plants were all stick straight and flowering heavily in the country. I am planting mine in the worst, unimproved clay "dirt" on the property line which is about as bad as what I pulled these out of. After reading other comments, I think they will flop in good soil, be invasive and get too tall, perhaps at the expense of blooms?
On May 3, 2011, prestonpaints from Charlotte, NC (Zone 7b) wrote:
Great plant in the right place. Grows extremely fast, drought tolerant and puts on quite a show in the weening days of summer! I started with just a few roots from my mother's garden- now I have divided it several times over a three year period and spread it through-out my garden. Don't use this plant in small gardens...it has the potential to take over. Will self sow and spread through the roots.
On Mar 19, 2009, SunnyBorders from Aurora, ON (Zone 5a) wrote:
Further to comment by straea:
Have grown this plant in three different perennial beds (all upgraded clay). I was actually assured by the nursery that it was not invasive. After two or three year it was advancing through the beds, in one case into the lawn and in another into an ornamental pine. It was so shallow rooted that removing all of it was quite easy. I now use clump-forming Heliopsis helianthoides (false sunflower) cultivars instead.
On Jun 1, 2008, straea from Somerville, MA (Zone 6b) wrote:
It was only after I planted this that I first heard about its potentially aggressive tendencies. Guess I didn't do enough research. Regardless, last year (its first year), planted in early summer from a good-sized but not huge container, it bloomed in a small clump on tall, wiry stems that didn't shade its neighbors as much as one might think from a tall plant. I enjoyed the pretty blooms and then birds enjoyed the seeds. Apparently it was expending most of its energy on its roots last year, because this year it came up in a clump over twice the size of last year's and has been spreading its roots outward over the past two months, sending up new sprouts as it goes. I wouldn't have planted it close to my Oriental poppies if I had known how aggressive it can be (and this is poor, dry soil, not its preferred good soil) and would recommend using it in a spot where its creeping root system would be a benefit rather than a potential drawback. By the way, my garden is very windy and it's in one of the windiest spots of all, and it didn't need staking, though it did tend to tilt its bloom stalks somewhat as it bloomed (which I personally thought added to its charm). I don't know if it adapts to frequently windy sites or what.
On Apr 21, 2008, Mountaindave from Port Orchard, WA wrote:
Their first year, they grew to about ten feet tall. Problem was they were not bushy so they looked scraggly with blooms only near the top. Should I pinch them?
Compared to a hybrid named Marc's Apollo growing next to them that was bushy, prolific and bloomed to the end of November, they were kind of sad. One more year of scraggly growth and they get yanked for more Apollos
On Jun 22, 2007, dicentra63 from West Valley City, UT (Zone 6b) wrote:
Perennial sunflowers! Who can resist?
They're great in the late summer/fall. The first season (2001), they grew 6-8 feet but have been growing progressively smaller each subsequent season. Probably poor soil or something: my soil is heavy-ish clay with little nitrogen, and I don't have the energy to enrich.
They do self-seed vigorously, but the seedlings are easy to identify and pull out. Compared to chinese elm seedlings, these are no sweat.
On May 23, 2006, SudieGoodman from Broaddus, TX (Zone 8b) wrote:
Zone 8b, Southeast, TX in Broaddus:
In March, I found a 3" tall seedling under my bird feeder. Tom fills bird feeder with sunflower seeds.
I transplanted seedling to full-sun area in March -06. I placed a 6' tomato cage over it while small. Today, May 23-06 my Maximiliani Sunflower is 5' tall and has one bloom 4" across.
Finches love this plant, so I leave a few for them. They blend in with it so well that you really have to look close to see them. As the flowers loose the yellow and turn brown in the fall, so do the finches! They do have a tendency to flop (the plant, not the finches) and seed too freely. Blooms September - October in my garden.
On May 23, 2004, HJohnston from Memphis, TN wrote:
I was disappointed at first since there were no blooms all summer and the plants became quite large and were shading out some other plants in the same bed. Then in the fall they were covered with six inch blooms when not much else was blooming. I have since moved them to another spot where they will not shade out other plants and there is a fence behind them which I use to tie them up with a string since the heads are very heavy and they tend to fall over. There are so many blooms they are also good for cutting for indoor arrangements in fall colors.
Helianthus maximilianii is sometimes sold as a perennial. I started seed and now have transplanted about 30 seedlings, all of them now (mid-July) 12"+ and growing, vigorous,with long arching leaves. All are clearly related but have the sunflower trait of variations on a common theme.
No flowers have appeared; the catalog described this plant as a kind of flowering hedge. That's what I hope for!
Very robust 6' to 8' plants, producing large quantities of single yellow blooms in late summer.
This plant has been said to grow in the following regions:
Opelika, Alabama Phoenix, Arizona Rimrock, Arizona Calistoga, California Menifee, California San Jose, California Vacaville, California Clifton, Colorado Atlanta, Georgia Fairfield, Idaho Champaign, Illinois Divernon, Illinois Washington, Illinois Iowa City, Iowa Somerset, Kentucky Amesbury, Massachusetts Somerville, Massachusetts Pinconning, Michigan Florence, Mississippi Pahrump, Nevada Jersey City, New Jersey Fairacres, New Mexico Roswell, New Mexico Southold, New York Elizabeth City, North Carolina Mint Hill, North Carolina Raleigh, North Carolina Oklahoma City, Oklahoma Berwick, Pennsylvania East Norriton, Pennsylvania Hamburg, Pennsylvania Lewisburg, Pennsylvania Conway, South Carolina Florence, South Carolina Arlington, Tennessee Memphis, Tennessee Austin, Texas (2 reports) Bear Creek, Texas Briarcliff, Texas Broaddus, Texas Dalworthington Gardens, Texas Linden, Texas Santa Fe, Texas Jensen, Utah West Valley City, Utah Virginia Beach, Virginia East Port Orchard, Washington Lake Forest Park, Washington Grantsburg, Wisconsin Albany, Wyoming Bessemer Bend, Wyoming Johnstown, Wyoming Riverton, Wyoming