FREE $25
Get $25 Off Any Order Of $50 Or More! -Tap to Save-

Mammoth Gray Stripe Sunflower

Select Option:

Mammoth Gray Stripe Sunflower

Description
A Tasty Treat
Enormous yellow flowers measure 14 in. across and yield a whopper crop of seeds! High oil content makes for great roasted flavor. Grows 9-12 ft. tall. 100 DAYS.
Product Details
  • Seasonboth Spring & Fall
  • Unit of Measure 1 oz
  • FormUpright, Annual.
  • LightFull Sun.
  • Height9 - 12 feet.
  • Spread15 - 24 inches.
  • Spacing2 - 4 feet.
  • Zones3 - 9.
  • FoliageVery rough; to 1 foot long heart-shaped green leaves.
  • Flower FormBright yellow flowers up to 20 inches in diameter.
  • ColorOrange-yellow.
  • BloomsJuly - September.
  • Germination10 - 14 days at 68 - 86 degrees F.
  • Soil RequirementsLight, well-drained, dry soil.
  • Growth RateModerate growth rate.
  • Seed CountApproximately 300 seeds per ounce. 1/4 lb. is approximately 1200 seeds. Sold by weight.
  • CommentsWill do well in poor soil. Tolerates heat and dry conditions. Average head size is 10 - 15 inches, but have reached 20 inches. Extremely large heads on 9 - 12 foot stalks.
  • Botanical NameHelianthus annuus 'Mammoth Gray Stripe'
  • Size8 - 14 inch flowers.
  • HeaderA Tasty Treat
  • Depth1 inch.
  • Days To Maturity100 days.
Shipping Schedule

Shipping Schedule

Orders for general merchandise and gift certificates are typically shipped within 5 business days. Most times, orders having items with different shipping schedules are held in full until the entire order is ready to ship based on your grow zone.

Plants will be shipped at the proper planting time for your area of the country using the shipping timeframes outlined below. We continually monitor weather conditions for extreme hot or cold and adjust shipping schedules as needed. Due to hot weather conditions, we are unable to ship most plant items in July and August.

2018 Spring Shipping Schedule for Plants
Zones Tomatoes & Peppers Potatoes Sweet Potatoes Onion Plants
1A-4A 5/14 - 6/1 3/26 - 6/15 5/21 - 6/8 4/2 - 5/11
4B 5/14 - 6/1 3/26 - 6/15 5/21 - 6/8 4/2 - 5/11
5A 5/14 - 6/1 3/5 - 6/15 5/14 - 6/8 3/26 - 5/11
5B 5/14 - 6/1 3/5 - 6/15 4/30 - 6/8 3/26 - 5/11
6A 4/23 - 6/1 3/5 - 6/15 4/30 - 6/8 3/5 - 5/11
6B 4/23 - 6/1 3/5 - 6/15 4/30 - 6/8 2/26 - 5/11
7A 4/23 - 6/1 2/26 - 6/15 4/30 - 6/8 2/19 - 5/11
7B 4/2 - 6/1 2/26 - 6/15 4/30 - 6/8 2/12 - 5/11
8A & B 4/2 - 6/1 2/19 - 6/15 4/23 - 6/8 1/29 - 5/11
9A & B 4/2 - 6/1 2/12 - 6/15 4/23 - 6/8 1/2 - 5/11
10A & B 4/2 - 6/1 2/12 - 6/15 4/16 - 6/8 1/2 - 5/11
Last Order Date 5/28 6/11 6/4 5/7
Zones Bareroot Roses Large Bareroots, Trees & Shrubs Tender Annuals All other Perennials & Potted Plants
1A-4A 4/16 - 6/1 4/2 - 6/22 4/30 - 6/8 4/30 - 6/22
4B 4/16 - 6/1 4/2 - 6/22 4/30 - 6/8 4/30 - 6/22
5A 4/1 - 6/1 3/19 - 6/22 4/30 - 6/8 4/2 - 6/22
5B 3/19 - 6/1 3/5 - 6/22 3/30 - 6/8 3/19 - 6/22
6A 3/5 - 6/1 3/5 - 6/22 4/30 - 6/8 3/5 - 6/22
6B 3/5 - 6/1 3/5 - 6/22 4/30 - 6/8 3/5 - 6/22
7A 2/26 - 6/1 2/12 - 6/22 4/2 - 6/8 2/26 - 6/22
7B 2/26 - 6/1 2/12 - 6/22 4/2 - 6/8 2/26 - 6/22
8A & B 2/19 - 6/1 2/12 - 5/25 4/2 - 6/8 2/20 - 5/25
9A & B 1/22 - 6/1 2/12 - 5/25 4/2 - 6/8 2/12 - 5/25
10A & B 1/22 - 6/1 2/12 - 5/25 4/2 - 6/8 2/12 - 5/25
Last Order Date 5/28 1A-7B: 6/18 6/4 1A-7B: 6/18
8A-10B: 5/21 8A-10B: 5/21

Additional Shipping Notes:

The type of product you order or the weather in our area to yours may affect the anticipated shipping schedule, shifting earlier or later, depending.

Trees and shrubs are kept in the nursery row until full dormant for optimum stress protection.

In all cases, we choose the fastest, most efficient way to send your orders via the U.S. Postal Service or FedEx. Large orders or large items may be shipped to you in multiple packages.

Please note that we cannot ship outside the 48 contiguous states.

Gardeners who bought this also bought...

Item added to cart

No-Risk Guarantee

We want you to be satisfied. If you’re not happy with one of our products, we’ll replace it, give you a credit or refund your money for the full amount of your purchase price. All nursery stock, trees, plants, seeds and merchandise are guaranteed for one full year.