Sunflower 'Big Smile'

Big Smile likes a position of full sun and remember to water often. Keep in mind when planting that Big Smile 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.

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 Big Smile about 21 days before your last frost date.

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

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

¹ Latin Dictionary