PERENNIALS / FORCING GUIDE
FORCING GUIDE FOR FIRST YEAR FLOWERING PERENNIALS FOR 2 MAJOR DATES IN NORTH AMERICA* (QUICK ANNUAL CYCLE) GENUS SPECIES SERIES/VARIETY USDA HARDINESS ZONE FORCING FOR SPRING (WEEK 19) IDEAL SOWING WEEK PLUG SIZE* PLUG BULKED UNDER NATURAL SD OR <=12 HR GROW WEEKS
SUPPLEMENTAL LD (14 HR OR NI) REQUIRED AFTER TRANSPLANT**
Rapido
CAMPANULA
3-9
48-49 288
10
Yes
carpatica
Double the Sun
COREOPSIS
4-9
51-52 128
8
Yes
grandiflora
Early Sunrise
COREOPSIS
4-9
49-50 128
8
Yes
grandiflora
Sunfire
COREOPSIS
4-9
51-52 128
8
Yes
grandiflora
SunKiss
COREOPSIS
4-9
51-52 128
8
Yes
grandiflora
Dasante Blue
DELPHINIUM
4-7
51-52 288
6-7
No
elatum
Guardian
DELPHINIUM
4-7
51-52 288
6-7
No
elatum
Blue Donna
DELPHINIUM
5-9
51-52 288
6-8
No
belladonna
Diamonds Blue
DELPHINIUM
4-9
51-52 288
7
No
grandiflorum
Rockin’
DIANTHUS
5-8
1-2 288
5
No
barbatus interspecific
Dalmatian
DIGITALIS
5-9
52-1 128
7
Yes
purpurea
Artisan
ECHINACEA
4-10
45-46 128+
13-15 weeks; SD from 2 to 7 true leaves 13-15 weeks; SD from 2 to 7 true leaves 13-15 weeks; SD from 2 to 7 true leaves
Yes
hybrida
Cheyenne Spirit
ECHINACEA
4-10
45-46 128+
Yes
hybrida
PowWow
ECHINACEA
4-10
45-46 128+
Yes
purpurea
Mesa Bright Bicolor
GAILLARDIA
5-10
52-1 128
7
Yes
grandiflora
Mesa Yellow
GAILLARDIA
5-10
52-1 128
7
Yes
grandiflora
Mesa Peach
GAILLARDIA
5-10
52-1 128
7
Yes
grandiflora
Mesa Red
GAILLARDIA
5-10
52-1 128
7
Yes
grandiflora
Sparkle White
GAURA
5b-9
2-3 128
8
Yes
lindheimeri
HEUCHERA
6-8a
32-34 180
8-10
No
sanguinea
Heucherette ™
Palace Purple
HEUCHERA
4-8
47-48 288
10-11
No
micrantha
Melting Fire
HEUCHERA
4-8
46-47 288
10-11
No
hybrida
Luna
HIBISCUS
5-9
-
-
-
-
moscheutos
FORCING GUIDE FOR FIRST YEAR FLOWERING PERENNIALS FOR 2 MAJOR DATES IN NORTH AMERICA* SD = Short Day (12 hours or shorter, except Lobelia is 10 hours) • LD = Long Day • ADT = Average Daily Temperature
104
FORCING GUIDE / Additional culture info online • panamseed.com/culture
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