United States Edition

Sunflower 'Sunzilla'

Helianthus annuus

Sunzilla is a popular variety of Sunflower, which belongs to the Helianthus genus (Helianthus annuus 'Sunzilla'). An annual, so it will last but a year in its native climate. Sunzilla is known for growing to a height of approximately 1.50 metres (4.88 feet).

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

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

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. Use USDA Hardiness Zone 4 - 9 as your guideline for the appropriate climate for this plant. 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' information

How long does Sunzilla take to grow?

These estimates for how long Sunflower 'Sunzilla' takes to sprout, grow and harvest are from real observations from real gardeners, right around the world. Start logging and journaling your observations to participate!

When should I sow Sunzilla?

Folia's when to plant Sunflower 'Sunzilla' estimates are relative to your last frost date. Enter your frost dates and we'll calculate your sowing and planting dates for you!

Sunflower Sunzilla Etymology

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


Sunflower Chat

  • Sunflower

    This group is about the joy of growing sunflowers, taking pictures of them, collecting the seeds, for eating, future ...

    59 members / 20 topics


Apartment Therapy logo

Whether you're rocking a full-fledged veggie garden in the backyard, have a stellar natural landscape in place of the front lawn, or are coaxing edibles and bee-friendly varietals from random containers on the porch, this online garden journal is for you.

More buzz about us...

Latest Activity

Folia Badges and Widgets

Folia Blog Widgets

Want some super cool badges to stick on your blog? What about a funky widget that shows everyone what you are growing? Sounds like you need to get over to our Goodies page pronto!

Tour | About | Help & Support | Contact | Terms | Privacy | Community Guidelines | Goodies

Homegrown by Nic & Nath All photos and content © their respective owners.

Free Gardening database | Free garden organizer | Vegetable garden software | Mobile gardening app

Popular Plants: Tomato | Sweet pepper | Chili pepper | Basil | Bean | Rose | Carrot | Cucumber | Lettuce | Onion | Strawberry | Daylily | Spinach | Potato | Radish