Sunflower Mongolian Giant

Sowing info

Sow sunflower seeds into individual pots of peat-free, multi-purpose compost in April. Sow one seed per 7.5cm pot. Push the seed 1.5cm into the compost and water in. Place undercover in a greenhouse or similar. When your plants reach about 30cm tall, plant them out into the garden after all risk of frost has passed. Plants grow quickly, so don’t be tempted to start too early.

Growing info

Sunflowers need sun. They do best in fertile soil in a sheltered spot, but will also do well in containers. However, if you want your sunflower to grow really tall, it’s best to plant it in the ground. Tall sunflowers may need staking, however you can strengthen sunflower stems by brushing your hand regularly across seedlings before they are planted out to simulate wind.

How to Grow Giant Sunflowers for Height, Wildlife and Cut Flowers

Giant sunflower seeds like Sunflower Mongolian Giant are an easy and rewarding choice for gardeners of all levels, including children keen to grow something impressive. Sow indoors in March in individual pots using nutrient-rich soil with plenty of organic matter, keeping seedlings watered and in a warm place until established. Alternatively, sow outdoors in rows once the risk of frost has passed, choosing a full sun position where plants can grow tall and strong. This striking variety of Helianthus annuus can reach an incredible height with thick stems that may need support, especially in exposed garden spaces. As the sunflower giant develops, its enormous seed heads become a valuable food source for garden birds such as finches through autumn and into winter, while the bright flowers attract bees, butterflies and other pollinators. Ideal as cut flowers or a bold garden feature, these giant annuals are not only edible but also a fantastic way to support wildlife, making them a must-have addition to any garden.

Shopping for Giant sunflower seeds

Add these giant sunflower seeds to your basket today and enjoy growing one of the tallest and most impressive flowers in any garden. Whether you sow indoors in March or sow outdoors after the risk of frost has passed, these sunflower giant plants are easy to grow in full sun with nutrient-rich soil and plenty of organic matter. Perfect for children or experienced gardeners alike, these giant sunflowers produce striking seed heads, support garden birds and pollinators like bees and butterflies, and make excellent cut flowers. Order now for fast delivery and watch your plants grow tall, strong and full of wildlife-friendly blooms throughout summer and into autumn.

Sowing Months: February – May
Harvest Months: July – October
Position: Full sun