The Mongolian Giant helianthus is an telling plant that can reach high of 12 - 14 feet . With its massive 16 - 18 inch heads full of come , it is truly a vision to lay eyes on in any garden or landscape . One of the unique features of this variety is its exceptionally long seeds , measuring 1 - 1/2 inches in length . These seeds are not only visually strike but also make a delicious snack when roasted .

When it fall to the growth cps of the Mongolian Giant sunflower , it typically takes around 90 days for the industrial plant to strain maturity . This means that from the fourth dimension you inseminate the seeds , you’re able to expect to see the full - grown sunflowers within around three months . However , it ’s important to take down that this timeframe can vary depend on various broker such as clime , dirt conditions , and care render to the plants .

To protrude growing Mongolian Giant sunflowers , you will need to seed the seeds directly into the soil or in large container as they have recollective taproot and do n’t transplant well . The ideal time to plant these sunflowers is in the late spring when the grease has warm up and there is no longer a risk of frost .

Here is a step - by - step guide to growing Mongol Giant sunflower :

1 . select a sunny placement : helianthus require full sun to thrive , so pick out a spot in your garden or landscape that receives at least 6 - 8 hours of unmediated sunlight per day .

2 . fix the ground : helianthus prefer well - drain grease , so make certain to loosen the ground and polish off any weeds or detritus from the planting expanse . you’re able to also improve the soil with compost or constitutive matter to ameliorate its rankness .

3 . Sow the cum : Plant the Mongolian Giant sunflower seed about 1 - 2 inches deep and space them at least 12 - 18 column inch aside to allow enough elbow room for the plants to originate . If you ’re plant multiple rows , maintain a aloofness of 2 - 3 feet between the rows .

4 . Water on a regular basis : Keep the soil systematically moist but not overly saturated . Water the plants deeply once a week , providing enough water supply to penetrate the root zone . quash overhead lacrimation , as it can cause the heavy flower head to droop or break .

5 . Support the plants : As the sunflower spring up tall , they may take living to prevent them from toppling over . you’re able to use wager or trellis to provide support and secure the plants as they reach their full tallness .

6 . varan for pests and diseases : Sunflowers are mostly resistive to pests and diseases , but it ’s always a beneficial idea to keep an eye out for any signs of difficulty . unwashed pests that may strike sunflowers include aphid , slugs , and snails . If necessary , use organic pestilence dominance methods to protect your plants .

7 . Harvest the seeds : Once the helianthus heads have fully senesce and the back of the peak heads turn brown , it ’s time to reap the seeds . disregard the head off the plant life and hang them upside down in a cool , dry place . Once the seeds are completely teetotal , you’re able to remove them from the heads and store them in airtight containers .

Growing Mongol Giant sunflowers can be a rewarding experience , as these towering beauties add a touch of nobility to any garden . With right care and attention , you may enjoy their stunning blooms and glean a bountiful crop of pleasant-tasting seeds in more or less 90 days .

Caroline Bates