Plants are huge with upright heavy, tall stalk that are a good 3-4in in diameter. These giant sized sunflowers are stunning not just because they grow an average of 8-10ft but their flower head size has a diameter that can reach and amazing 12-14in. The tall stalks support bright, yellow single lush flowers with umbrella-like leaves that surround huge centers that are filled literally with up to one thousand with seeds. Sometimes the heads get so large that the stalk begins to bend but quite often they grow up straight and tall. Seeds are very attractive to birds. The flowers towering over the garden making a perfect growing screen or background for any shorter plants.
Annual sunflower seeds grow best in USDA Plant Hardiness Zones 4-9, which includes much of the Northeast, Mid-Atlantic, Midwest and Pacific Northwest. Not sure whether Russian Mammoth Sunflowers will grow in your area? Call 1-888-281-9337 to speak with a Greenhouse Megastore sales associate.
Wetsel Russian Mammoth Sunflower Seed Features:
- Bloom Color - Yellow with Orange Center
- Zone - 4-9
- Germination Time - 10-14 Days
- Blooming Season - Late Summer to Early Fall
- Maximum Height - 8-10ft
- Plant Spread - 36-40in
- Blossom Size - 12-14in
- Exposure/Light Requirement - Full Sun