Seed Swaps

Sunflower 'Taiyo'        

Helianthus annuus

  • 5 plantings
  • 1 available for swap
  • 0 wanted
  • 9 stashed

Taiyo is a popular variety of Sunflower, which belongs to the Helianthus genus (Helianthus annuus 'Taiyo'). 'Taiyo' is considered a heirloom cultivar. Blooms appear in these approximate colours:   Dark yellow and   Canary yellow and   Seal brown. When mature, blooms are roughly 25.0 cm (that's 9.75 inches in imperial) in diameter.The mature flowers are of a Single form. When ripe, fruit appear in these approximate colours:   Davy's grey and   Pale brown. Leaves appear approximately as a   Ao green and   Dark spring green colour.

Huge flowers. Orange yellow petals and dark chocolate brown centres on single strong stems.
Flowers can grow to 30cm across, and plants grow to 2m in height.

This variety is an Flower that typically grows as an Annual, which is defined as a plant that matures and completes its lifecycle over the course of a single year. Taiyo is known for its Erect habit and growing to a height of approximately 1.44 metres (4.68 feet). This variety tends to bloom in mid summer.

Japan is believed to be where Taiyo originates from.

As Taiyo Sunflower is a low maintanence plant, it is great for beginner gardeners and those that like gardens that don't need much overseeing.

This variety plant info is provided by the myfolia gardener's wiki. All details about Taiyo have been kindly provided by our members.

How to grow Taiyo

  • Full Sun

  • Medium

Prefers full sun in well drained soil. Should not need staking unless in an exposed position.

Try to plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Taiyo is thought of as half hardy, so remember to protect this plant from frosts and low temperatures. The USDA Hardiness Zones typically associated with Taiyo are Zone 3 and Zone 10. Ensure your soil is loamy and clay and has a ph of between 5.7 and 8.1 as Sunflower is a weakly acidic soil to weakly alkaline soil loving plant.

Growing Taiyo from seed

Sow thinly 1cm deep and 30cm apart in well cultivated soil. Alternatively, they seeds can be started inside in late winter early summer at 20C. Put two seeds in a 7cm pot and weed out the weakest seedling before growing on

Try to aim for a seed spacing of at least 5.85 inches (15.0 cm) and sow at a depth of around 0.49 inches (1.25 cm). Soil temperature should be kept higher than 13°C / 55°F to ensure good germination.

By our calculations, you should look at sowing Taiyo about 21 days before your last frost date.

Transplanting Taiyo

When well grown, acclimatise the plants to outside conditions and plant out when all frost has gone.
Choose a bright, sunny,position out of the wind

Ensure that temperatures are mild (minimum night temperatures should be around 10°C / 50°F) and all chance of frost has passed before planting out, as Taiyo is a half hardy plant.

Harvesting Taiyo

Can be used as cut flowers, but the bloom is large, and usually only one per plant.

This variety tends to be ready for harvesting by late summer.

Sunflower Taiyo Etymology

The botanical epithet is from the Latin annuus meaning “annual”.1
‘helios’ means sun

Taiyo folklore & trivia

This tall sunflower was discovered growing in Japan.


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