Sunflower – Giant Grey Striped (Mammoth)

One of the largest sunflowers in our selection, the Giant Grey Striped’s stems measure between 200 and 350 cm. Majestic, it can be used as a windbreak or temporary screen to create shade or privacy. Its large heads of 30 to 50 cm in diameter produce delicious, plump, ridged seeds to be enjoyed roasted.

Growing tips

Conditions of germination:

depth of sowing: 2 cm

optimal temperatures of germination: 20 to 30 ºC

time for germination: 7 to 21 days

When to sow:

indoor sowing 4 to 6 weeks before the last frost date in your area OR

direct seeding after any risk of frost

Sowing technique: in line

Draw a line in the ground (in a pot or in the ground), then sow the seeds.

Transplant outdoors (for seedlings started indoors):

When all risk of frost has been eliminated

Distance in the garden:

between plants: 45 to 60 cm

between rows: 60 cm

Height of the plants: 200 cm

Soil: well drained, fertile, rather dry

Exposure: full sun

Maturation: 75 to 90 days

Specificities: grows well in pots

QUICK STATS

Number of seeds: ±30

Difficulty: Easy

Type: Heirloom / Open pollinated

Lifecycle:Annual

Additional information

Weight            1.5 g

Difficulty         

Easy

Sowing          

Direct, Indoor

Lifecycle        

Annual

Root cellar     

No

Sowing season        

Spring, Summer