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Helianthus maximiliani - Maximilian's sunflower

Helianthus maximilianii Maximiliani
Maximilian sunflower, Maximilian's sunflower

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Very well received and very quickly. How far apart should I plant them... let me check... and should I soak the seeds beforehand??

Catherine V., 05/02/2018

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This plant carries a 6 months recovery warranty

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Value-for-money
Perennial plant with a large growth (120 to 250cm (47 to 98in)) and invasive, producing numerous flower stems from June to October. The 7cm (3in) diameter flowers are bright yellow. It is an excellent cut flower that allows you to create beautiful summer bouquets.
Flower size
7 cm
Height at maturity
2.50 m
Exposure
Sun
Annual / Perennial
Perennial
Germination time (days)
21 days
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Sowing period March to April
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Flowering time June to October
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Description

Helianthus maximiliani, or Maximilian Sunflower, is a perennial plant that grows rapidly, with branched stems reaching between 1.20m (4ft) and 2.50m (8ft). They bear about thirty bright yellow single flowers that form a column of flowers measuring 60 to 80cm (24 to 32in).
Its flowers resemble daisies with pointed petals, measuring 7cm (3in) in diameter, and emit a delightful chocolate fragrance.
The main stem branches out and each branch carries a flower facing towards the sky. Three stems make for a splendid wildflower bouquet.
This magnificent flowering occurs from June to October.
The vigorous roots of the Maximilian Sunflower quickly spread the clump. In autumn, mound the edge of your flower bed and remove some of the roots on the periphery to limit its expansion.

To enjoy your Heliathus bouquets for longer, follow these tips:

  • Cut the flowers in the morning. Use a knife that has been thoroughly cleaned beforehand.
  • Change the water in the vase every day with fresh water.

In the garden, sow Helianthus maximiliani at the back of the flower bed, where it will majestically dominate the other flowers.

Until before flowering, the plant optimizes its growth by following the sun's path. This phenomenon, called heliotropism, has given rise to some of its common names: Heliotrope, Sunflower, Sunflower, Garden Sunflower...

An ecological asset:
Throughout summer, the nectar-rich flowers of Helianthus attract pollinating insects and butterflies to your garden. It's a great way to improve the ecosystem of your garden and promote fruit and vegetable production in your vegetable patch.
The oil-rich seeds are particularly appreciated by birds (Parrots, Tits, etc.). At the end of flowering, harvest them to make the birds happy during the winter shortage.

Flowering

Flower colour yellow
Flowering time June to October
Inflorescence Flower head
Flower size 7 cm
Fragrance Fragrant, Chocolate scent
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms
Flowering description The flower is a head composed of a heart of greenish-yellow florets surrounded by a single rank of bright yellow petals.

Foliage

Foliage persistence Deciduous
Foliage colour dark green
Foliage description The 10 to 30cm (4 to 12in) long leaves, lanceolate and curved, of dark green colour, are slightly villous.

Plant habit

Height at maturity 2.50 m
Spread at maturity 1 m
Growth rate fast

Botanical data

Genus

Helianthus

Species

maximilianii

Cultivar

Maximiliani

Family

Asteraceae

Other common names

Maximilian sunflower, Maximilian's sunflower

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Planting and care

Sow Maximilian's Sunflower from February to April in a seed tray. Use a good quality compost that you will sieve on the surface to ensure the seed is well connected to its substrate. Before sowing, lightly press down the compost with a board. Scatter your seeds freely. Cover the seeds by sprinkling compost on top or using vermiculite, lightly press down and water generously with a fine rain. Place your seed tray in a well-lit area, without direct sunlight, at a temperature of 18°C (64.4°F) to 21°C (69.8°F).

The seeds will germinate in 7 to 21 days. As soon as the plants are manageable, transplant them into 7cm (3in) pots. Keep the compost moist but not excessive during growth. Then, 15 days before their final planting, start gradually acclimatizing them to a temperature of 15°C (59°F).

By the end of May or early June, the temperature in the garden will be warm enough to plant your young plants. Choose a sunny location. Add a good handful of compost to each planting hole. Space your plants 60cm (24in) apart.

Regularly remove faded flowers to maintain beauty and promote their renewal.

Protect your seedlings from attacks by snails and slugs, which are fond of these young plants. By sowing chives near your sunflowers, you will deter aphids from settling in.

After flowering, cut the stems down to 50cm (20in) high.

Sowing period

Sowing period March to April
Germination time (days) 21 days

Intended location

Suitable for Meadow
Type of use Back of border
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Amateur
Exposure Sun
Soil pH Any
Soil moisture Moist soil, Fertile, moist, well-drained.
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