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Sunflower Russian Giant Seeds - Helianthus annuus
Hello, I plan to plant these sunflowers in a rather dry and rocky soil. Would horse manure, dry leaves, or cut grass improve the conditions for the growth and life of the sunflowers?
mélanie, 05/08/2018
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Dispatch by letter from €3.90.
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This plant carries a 6 months recovery warranty
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We guarantee the quality of our plants for a full growing cycle, and will replace at our expense any plant that fails to recover under normal climatic and planting conditions.
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Helianthus annuus 'Russian Giant' is an impressive variety that features huge yellow blooms with an orange-brown centre. The 3-metre-tall plants are ideal for planting in front of unsightly walls or garden sheds. Sunflowers are popular annuals that are generally direct sown in spring in ordinary, well-drained garden soil.
The Sunflower, or Helianthus annuus in latin, is a large annual plant belonging to the Asteraceae family, native to the Americas. It has long been domesticated for its edible seeds and is now cultivated on a large scale for its oil. 'Russian Giant' is a spectacular selection that rapidly grows to a height of 3 m. It produces large, single flowerheads (capitulum) that measure about 30 cm across. The external petals (technically, ray flowers) are bright golden yellow, arranged around a large orange-brown central disc. The flowering period lasts from July to September. The floral stems are strong and sparsely branched, covered in simple, alternate to opposite heart-shaped green leaves. They are carried on a fairly long petiole and are rough to the touch.
This easy-to-grow plant, with its large seeds and cheerful disposition, is perfect for introducing children to gardening. It is particularly suited to sunny borders and summer bedding schemes. All it requires is a healthy dose of sunshine and moist, well-drained soil. Its flowers make fabulous arrangements combined with fern leaves, goldenrod, statice and carnations for example.
Good to know: Before flowering, sunflowers famously optimize their growth by following the course of the sun in a phenomenon known as heliotropism. All summer long, sunflowers attract pollinating insects and butterflies into the garden, improving its ecosystem and encouraging fruit set in the orchard or vegetable patch. The oil-rich seeds are a favourite with garden birds (nuthatches, tits, finches, sparrows, blackbirds etc.). Harvest them after flowering to provide birds with a valuable food source during the cold winter months.
Cooking with sunflowers:
Sunflower buds, petals and seeds are all edible. Brighten up green salads with a few nutty-flavoured petals. The green buds have a Jerusalem artichoke taste when blanched and tossed in garlic butter. Unhulled seeds can be eaten both raw and grilled.
Flowering
Foliage
Plant habit
Botanical data
The Sunflower can be sown:
Sow Sunflowers from March to April in pots. Sow your seeds in groups of 2 at a depth of 1 cm. Use a good quality potting soil that you will sieve on the surface to bind the seed to its substrate. Before sowing, lightly press the soil with a board. Cover the seeds by sprinkling soil or vermiculite on top, lightly press and water abundantly with a fine rain. Place your pots in a well-lit area, without direct sunlight, at a temperature of 20°C to 25°C. Lower the temperature at night to 17°C to create a beneficial alternation for germination. The seeds will take 21 days to germinate. Keep the soil moist but not excessively during growth.
20 days after the appearance of the young plants, remove the weaker shoot and keep only one per pot.
15 days before their final planting, start gradually acclimating them to a temperature of 15°C. In late May and early June, the temperature will be warm enough in the garden to plant your young plants. Choose a sunny location. Add a good handful of compost to each planting hole. Space your plants 1 meter apart.
The strong growth of the Sunflower will require regular watering. When the plant reaches about 1 meter, watering can be stopped and it can rely on rainwater even if it is scarce.
It takes 75 to 80 days from sowing to flowering.
Protect your seedlings from attacks by snails and slugs, which are fond of these young plants. By planting chives nearby your sunflowers, you will keep aphids away from them.
Sowing period
Intended location
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
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The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.