Sunflower 'Sunzilla'

Helianthus annuus

How to grow Sunflower 'Sunzilla'

  • Full Sun

  • High

Enjoys a full sun position in your garden and remember to water often. Keep in mind when planting that Sunzilla is thought of as half hardy, so protect with a row cover whenever the temperatures drop. 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 Sunzilla from seed

Try to aim for a seed spacing of at least 4.68 inches (12.0 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 Sunzilla about 21 days before your last frost date.

Transplanting Sunzilla

Ensure that temperatures are mild and all chance of frost has passed before planting out, as Sunzilla is a half hardy plant.

Harvesting Sunzilla

Sunflower Sunzilla Etymology

The botanical epithet is from the Latin annuus meaning “annual”.1

Footnotes