Healianthus Italian Green Heart
Helianthus Italian Green Heart is a fresh twist on the classic sunflower. The soft yellow petals and the green-yellow centre bring cheerfulness to any garden or bouquet.
1 bag ≈ 1 gram ≈ 180 seeds
Specifications
| Type of product | Flower seeds |
| Suitable as a cut flower | Yes |
| Planting site | full sun |
| Planting time | March-June |
| Flowering time | August-October |
| Seeding time outdoors | April–June |
| Plant depth seeds | 2 cm |
| Height Plant | 130 cm |
| Germination time | 1-2 weeks |
Tips
When to sow
Indoor pre-sowing: From March–April to get an early start and advance flowering.
Direct sowing outdoors: From mid-April to June, once all risk of frost has passed.
Sowing method
Sowing depth: Sow seeds 2–3 cm deep in well-drained soil.
Spacing: Keep 30–45 cm between plants; for larger varieties, up to 60 cm may be needed.
Germination temperature: Between 15–25°C. Seeds usually germinate within 7–10 days.
Location and soil
Light: Full sun is essential – the more sun, the stronger the stems and richer the blooms.
Soil: Well-drained, fertile soil enriched with compost or organic matter. Sunflowers are vigorous growers and need plenty of nutrients.
Care
Watering: Water regularly, especially in dry periods. Avoid waterlogged soil to prevent root rot.
Support: Use a stake or sturdy support to keep plants upright, especially for tall varieties or windy spots.
Rotating (indoor growing): If grown in pots indoors, rotate occasionally so the plant grows straight and doesn’t lean toward the light.
Harvest and use
Seed harvest: Harvest sunflower seeds when the back of the flower head turns brown and the seeds feel firm. Cut the heads and let them dry in a dry, airy place.
Decorative use: Cut flowers when the petals are fully open and place in water immediately for cut flower arrangements.
Extra tips
Bird feeding: Leave a few heads on the plants to provide food for birds in autumn and winter.
Companion planting: Sunflowers pair well with other summer bloomers like cosmos, zinnias, and dahlias for a colourful border.
Self-seeding: If you leave a few heads until the end of the season, sunflowers can self-seed for the following year.
How many seeds do you need per square meter?
Each packet contains enough seeds for approximately 1 square meter of flowers. This may vary by variety, so consider the mature size of the plants. A helpful tip: don’t sow all at once. Spread out sowing to extend the blooming season and have a backup if the first round fails. One seed can grow into a full plant, so allow enough space. Store your seeds in a cool, dry place – they’ll remain viable for 2 to 3 years.
Want more tips on sowing and caring for your flower seeds? Read the full sowing & planting guide on our blog.
Grow your own happiness with our annual flowers: sow, care, harvest & enjoy!
Our annual flower seeds are of the highest quality – perfect for cut flowers and loved by professional flower growers. Thanks to their high germination rate, you’ll enjoy abundant blooms. These flowers complete all life stages – from seed to bloom – in one season and are packed with growing energy. The result? Months of blooming joy! And best of all: for many varieties, the more you pick, the more flowers the plant produces. Our seeds are untreated and uncoated, making them ideal for growing organic flowers too.
When to sow
Indoor pre-sowing: From March–April to get an early start and advance flowering.
Direct sowing outdoors: From mid-April to June, once all risk of frost has passed.
Sowing method
Sowing depth: Sow seeds 2–3 cm deep in well-drained soil.
Spacing: Keep 30–45 cm between plants; for larger varieties, up to 60 cm may be needed.
Germination temperature: Between 15–25°C. Seeds usually germinate within 7–10 days.
Location and soil
Light: Full sun is essential – the more sun, the stronger the stems and richer the blooms.
Soil: Well-drained, fertile soil enriched with compost or organic matter. Sunflowers are vigorous growers and need plenty of nutrients.
Care
Watering: Water regularly, especially in dry periods. Avoid waterlogged soil to prevent root rot.
Support: Use a stake or sturdy support to keep plants upright, especially for tall varieties or windy spots.
Rotating (indoor growing): If grown in pots indoors, rotate occasionally so the plant grows straight and doesn’t lean toward the light.
Harvest and use
Seed harvest: Harvest sunflower seeds when the back of the flower head turns brown and the seeds feel firm. Cut the heads and let them dry in a dry, airy place.
Decorative use: Cut flowers when the petals are fully open and place in water immediately for cut flower arrangements.
Extra tips
Bird feeding: Leave a few heads on the plants to provide food for birds in autumn and winter.
Companion planting: Sunflowers pair well with other summer bloomers like cosmos, zinnias, and dahlias for a colourful border.
Self-seeding: If you leave a few heads until the end of the season, sunflowers can self-seed for the following year.
How many seeds do you need per square meter?
Each packet contains enough seeds for approximately 1 square meter of flowers. This may vary by variety, so consider the mature size of the plants. A helpful tip: don’t sow all at once. Spread out sowing to extend the blooming season and have a backup if the first round fails. One seed can grow into a full plant, so allow enough space. Store your seeds in a cool, dry place – they’ll remain viable for 2 to 3 years.
Want more tips on sowing and caring for your flower seeds? Read the full sowing & planting guide on our blog.
Grow your own happiness with our annual flowers: sow, care, harvest & enjoy!
Our annual flower seeds are of the highest quality – perfect for cut flowers and loved by professional flower growers. Thanks to their high germination rate, you’ll enjoy abundant blooms. These flowers complete all life stages – from seed to bloom – in one season and are packed with growing energy. The result? Months of blooming joy! And best of all: for many varieties, the more you pick, the more flowers the plant produces. Our seeds are untreated and uncoated, making them ideal for growing organic flowers too.
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