Canadian Orders: Flat-Rate Shipping on Orders over $75 | Orders Over $150 Ship Free!
Sold Out $3.69
CERTIFIED ORGANIC! Mongolian Giant sunflower seeds produce seriously tall plants with stems that grow up to 4.2m (14') in just four months. The huge flower heads are laden with seeds over 2cm (1") long - the longest of any sunflower seeds. The large edible seeds can be harvested and roasted or left for the birds to enjoy. Direct sow as early as possible, as soon as the soil warms up in spring.
Annual
Quick Facts:
Size: 2g (approx. 17 seeds)
How To Grow: Sunflowers will grow in just about any well-drained soil, and they are drought tolerant. Annual flowers that can grow to incredible heights in just one season. Continue reading below for tips on how to grow sunflowers from seed.
Difficulty
Easy
Season & Zone
Exposure: Full sun
Starting
Sow seeds 5mm-1cm (¼-½”) deep. Space dwarf varieties 15cm (6″) apart, but give the giants lots of room at 1m (3′) between plants.
Growing
To grow really big plants with really big flowers, enrich the soil with organic matter and incorporate 2 cups of balanced organic fertilizer per 3m (10′) of row, and irrigate regularly. When the plants are 30cm (12) tall, dissolve 5ml (1 tsp) of borax (for boron) in 350 ml (12 fl oz) of water and spread the solution over 5m (15′) of row. Be careful not to over-apply this solution. This application of boron will produce bigger seeds and flower heads. Do not apply boron to other garden plants. When the back of the flower head turns yellow, it is ready to be cut from the plant.
Companion Planting
Sunflowers planted near rows of corn are said to increase yields. Sunflowers can be used to draw heavy metals, toxins, and even radiation from soil, but should be burned at the end of the season if grown for this purpose. Plant sunflowers amid squash plantings to improve pollination and overall production.
Sold Out $3.29
Emily Organic basil seeds are CERTIFIED ORGANIC! Emily is a fantastic new dwarf basil, a compact Genovese variety that works particularly well in containers. This...
View full product detailsSold Out $3.29
Sweet Basil organic seeds are CERTIFIED ORGANIC! This vigorous basil variety produces large, mid-green leaves all summer long. Keep picking the growing tips and the...
View full product detailsSold Out $5.99
CERTIFIED ORGANIC! The great feature of Eleonora Organic broad beans is that the plants stay relatively short, so they are not prone to falling over. This...
View full product detailsOur brick + mortar stores are located at:
Huntsville: 2-114 Main St. E P1H 1K6
Peterborough: 418 George St. N K9H 3R5
Sign up to get the latest on sales, new releases and more…
© 2023 Sustain.
Ecommerce Software by Shopify