Handbook of Plant and Crop Physiology

GERMINATION AND EMERGENCE 89

None if fresh Stratify 5

C 6 wk

Nick with a file or

soak in H

SO 2

4

30

min

5–9 15–20 21–28 10–16 28–40 5–85–8 25–30 28–40 15–20

Sidalcea malviflora

Prairie mallowMalvaceae

Silene armeria

CatchflyCaryophyllaceae

Sisyrinchium

spp.

Blue-eyed grassIridaceae

Stachys

spp.

BetonyLamiaceae

Stokesia laevis

Stoke’s asterAsteraceae

Tagetes erectaT. patula

MarigoldAsteraceae

Teucrium chamaedrys

GermanderLamiaceae

Thalictrum rochebrunianum

Meadow rueRanunculaceae

Thermopsis

spp.

False lupineFabaceae

P P P-W P P AA P P P

20–24

22

21–23 18–21 22–25 21–2421–24

21 22 22

10–14 12–15

15 10

15–18 16–1816–18 15–18 15–18 15–18

D or L D or L

L

D or LD or L

If seeds is more than 6 months

old, sow and chill 4–10°Cfor 1–2 wk

Seed is small. Cover lightly or

not at all.

Reduce night temp. of

medium by 3

C for best

germination. Do notoverwater. Germinationmay be erratic.

Reduce night temp. of

medium by 3

C for best

germination.

T. erecta

cultivars require 14 hr ormore of darkness per day atthe germination and earlyseedling stages for properflowering.

Seed vitality is quickly

reduced as seed ages. Freshseed may germinatewithout scarification.

continues