Among numerous helianthus ( helianthus annuus)varieties , the ginormous Mammoth is a delight . Not only is it easy to develop , but the sheer size of this radiant flower predominate overhead strikes awe into onlookers below . Keep reading , and we will share with you how to best care for the gigantic sunflower to enjoy tremendous results in your garden or landscape .
What is the Mammoth Sunflower?
gigantic orRussian Mammothis a grandiloquent assortment , single stem helianthus that was developed in Russia during the18th century . It was historically school for oil color , producing a higher oil colour return than other helianthus smorgasbord . Today ’s mammoth helianthus seeds have been cross mainly for agricultural use , to encounter increase worldwidedemand for helianthus oil .
Both gigantic grey stripe and Russian mammoth varieties produce law of similarity size plants with adorable , ornamental flowers and eatable seeds . Sturdy , shining green stems of gigantic sunflowers rise to heights between 9 - feet and 12 - foundation tall . all-encompassing , heart - shaped leave grace the radical . monumental , 20 - inch flower psyche atop have a daisy - like , cheerful disposition with promising yellow flower petal encircling a brown center .
How to Grow Mammoth Sunflowers?
gigantic sunflower are one-year plant typically sown from seed that flourish outside in USDA Plant Hardiness Zones 2 - 11 . energize optimum maturation by provide ideal growing weather :
Soil
helianthus are not cross about soil eccentric , as long as it is not too compact for the taproot to sink in well . gigantic sunflower taproot can grow down as far as 4 - feet deep . Loamy to sandy , well - draining soils are most accommodative .
Mammoth sunflowers are happy with a soil pH of 6.0 to 7.5 .
Sunlight
As you may have guessed , mammoth helianthus do prefer full sunshine . site these flowers where they will encounter six to eight hour of unmediated sunlight daily .
Water
Water on a regular basis . Provide several gallons of water per week , by watering deep to quench the taproot .
Fertilizer
gigantic sunflowers demand nutrients because they are tight - arise plant life . For good resolution , treat the soil with composted manure , or either tardily - expel gritty or dilute fluid plant food .
Extra Support
Because they are so large and fairly top - profound , mammoth sunflowers might want the additional support leave by jeopardize the stem .
gigantic sunflowers are susceptible to wind damage , so taste to locate these plant in an area where they will be shelter from the wind , such as alongside a fencing , rampart , or raw windbreak .
Planting Step-by-step
flora mammoth sunflowers during late spring , after the first freeze , has go on , and the soil temperature reaches 50 degrees Fahrenheit or warmer . To maximize flowering throughout the season , you may plant sunflowers in succession typically throughout May and mid - July .
Ideal spacing for gigantic sunflower is20 - inches apart ; plant in row 30 - inches asunder . For good results , you might need to sow multiple seeds in a clustering ( each 6 - inch apart ) and thin the seedling as they develop . By thinning the seedlings , you may select the hardy sunflowers . set out thinning seedling at 3 - inches , then again at 1 - pes , and finally 2 - feet tall .
Harvesting Sunflower Seeds
Either rude or roasted , sunflower seeds make a delicious , healthy bite . you’re able to also preserve the seeds for next yr ’s planting , or use dried seminal fluid as razz provender . When the flower fountainhead wilt disease and the foliation turns yellow , the helianthus isready for harvest .
OR
question if you could farm sunflowers in a container ? you’re able to ! ascertain out how by reading our blog , “ Can You Grow Sunflowers in a Pot ? ”
Sunflower Photo Gallery
Gentle Giants
Mammoth sunflowers favor to grow in a localization that is protect from the hint . They make a lovely backcloth to hide a fencing or wall .
Sneak Peek
Depending on the variety , tight - develop sunflowers will bloom between 80 and 120 days after sow seeds . Enjoy these brilliant flowers all summertime long by planting sunflower in succession .
Sun Worshippers
Sunflowers are heliotropic , mean they grow their blossom head to espouse the Lord’s Day . scientist believe thiscircadian rhythmhelps young stems to acquire strong , to support heavy - laden mature flower heads .
Sunny Smile (Sunspot)
If you want that classic , mammoth helianthus look without the tremendous size , try thesunny smilevariety . Although miniature ( 6 ” - 20 ” tall ) , this helianthus boats bighearted beauty with yellow petals and a bluff brown center .
Attract Wildlife
helianthus draw in wildlife to your backyard . Butterflies and bees are draw to the flowers ’ pollen . Birds , squirrels , cervid , and rabbits also like to munch on these tasty plants .
Record-breaking Dimensions
Mammoth sunflowers produce a massive headway tramp from 15 - inches to 20 - inches in diameter . Just suppose the flower sizing of German nurseryman , Hans - Peter Shiffer’sworld disk , tallest sunflower grown at 30 - feet , 1 - inch tall .
Sprouting Seeds
Mammoth helianthus seed sprout within 5 to 10 days after plant . It is best to plant seeds directly into the soil but to give helianthus a head commence for short farm season , you could start seedlings indoors .
Photo Opportunity
Here we see a picture - perfect field of blooming sunflowers , an first-class backcloth for a family photo . helianthus are mature agriculturally , preponderantly across the mid - west , as a gyration crop to help keep wanted nutrients in the soil .
Branching Beauties
fork helianthus varieties produce several blooms during the get season . Because various colors and sizes are available , ramify varieties make a lovely choice for growing bouquet flowers .
A post share by Priyanka Chopra Jonas ( @priyankachopra )
Child’s Garden
appropriate nestling ’s pursuit in gardening by engraft mammoth sunflower . Children will marvel at the helianthus ’s ability to outgrow them by mid - summer , a nifty inducement to like for growing plants .
Gorgeous Shade-cover
eminent sunflower varieties likesunzilla , titan , andskyscrapercan grow between 12 - feet and 16 - foot marvellous . Here we see tall variety sunflowers shading a easy sitting area .
Geometric Design
develop ejaculate at the center of sunflowers in an elaborate way wrench into slopped - knit , spiraled , and circular patterns .
Striped Seeds
Variegated seeds of mammoth sunflower salmagundi are black and white striped . The striking appearance look too pretty to eat !
Wilting Flowers
Wilting sunflowers are about ready to harvest . Wait for the flower petal to drop and foliation to yellow before cutting mammoth flower heads .
Complimentary Landscaping
Brilliant colour and ginormous height not only make the helianthus a focal point , but here we see how the blooms complement the trim on this house to align home and garden graciously .
Where to Buy Mammoth Sunflowers Online?
Shop online to have gigantic helianthus seeds shipped now to your threshold , and you will be quick for planting this outpouring .
Burpee
You will have a 100 % expiation guaranteed when you buy mammoth sunflower seeds from Burpee ; 150 heirloom seeds per parcel .
snap here to order from Burpee .
Amazon
develop gigantic grey stripe sunflower from David ’s Garden Seeds available on Amazon ; package of 50 heirloom come .
Click here to find this on Amazon .
Plant Sow Right Seeds to delight Russian gigantic sunflowers in your backyard ; usable on Amazon , 8 - gram package of heirloom seeds .
Walmart
gigantic gray stripe helianthus seeds from Mountain Valley Seed Company grow to tremendous heights , uncommitted at Walmart , 8 - gram mail boat of heirloom come .
Click here to find this at Walmart .
Now that you sleep together how to deal for gigantic sunflowers , you could order your seeds , and while you ’re waiting , check out our blog , “ What ’s the Best Time to Plant Sunflowers ? ” for even more detail about planting sunflowers .
