Best Flower Seeds to Sow in September

Explore flower seeds that are well suited to sowing in September. Browse popular flower seeds to sow this month, with seasonal seed varieties for gardens, pots, borders and allotments.

120 products

120products

Save 10%

Meconopsis 'Lingholm' (Ex Grandis)

Blue Poppy, Himalayan Poppy, 'Fertile Blue Gr…

£3.95£3.56

Save 10%

Meconopsis Grandis

Blue Poppy

£3.95£3.56

Save 10%

Achillea Millefolium Mix

Common Yarrow, Devil's Nettle, Hundred-Leaved…

£2.75£2.48

Save 10%

Papaver Somniferum Ultimate Mixture

Opium Poppy

£3.65£3.29

Save 10%

Meconopsis Baileyi

Previously Called Meconopsis Betonicifolia

£3.75£3.38

Save 10%

Papaver Macrostomum Black Magic

Black Magic Poppy, Persian Poppy

£3.95£3.56

Save 10%

Muhlenbergia Capillaris

Pink Muhly Grass, Muhly Grass, Hairawn Muhly,…

£3.45£3.11

Save 10%

Angelica Sylvestris Ebony

Vicars Mead

£3.95£3.56

Save 10%

Papaver Somniferum 'Lauren's Grape'

£3.70£3.33

Save 10%

Rhinanthus Minor

Yellow Rattle, Cockscomb, Hay Rattle

£2.60£2.34

Save 20%

Digitalis Ferruginea

Foxglove

£2.95£2.36

Save 10%

Astrantia Major 'Ruby Wedding Series'

Masterwort 'Ruby Wedding'

£3.75£3.38

Save 10%

Helleborus Orientalis 'Black Beauty'

£3.65£3.29

Save 10%

Meconopsis Himalayan Velvet (Lingholm - Ex Grandis)

Himalayan Poppy, Meconopsis Ex Grandis

£3.75£3.38

Save 30%

Oxyria Dignya

Mountain Sorrel, Alpine Sorrel, Alpine Mounta…

£2.55£1.79

Save 20%

Astrantia Maxima

Masterwort

£3.95£3.16

Save 10%

Papaver Orientale 'Princess Victoria Louise'

Princess Victoria Louise

£2.65£2.38

Save 20%

Stipa Lessingiana

Feather Grass, Hair Grass

£3.25£2.60

Save 10%

Papaver Somniferum Summer Blaze

Opium Poppy

£2.90£2.61

Save 10%

Geranium Hardy Mixed

£3.20£2.88