Factors Affecting the Yield of Industrial Hemp – Experimental Results from France - Hemp: Industrial Production and Uses - page 96

Appendix 1

Table A1. Vegetative stages of hemp.

Remarks on
leaves and
flowers

Total
temperature Cycle Code Definition Size Duration

Germination
and
emergence

Sowing and
lifting

0000 0 d = seedling

0001 Emergence of the

radicle

85° Cj

0002 Emergence of the

hypoacetabular
cup

0003 Opening of the

cotyledons

+/- 4-10 d 100° Cj

Vegetative
stages

Planting

1002 1st pair of flowers 1 node/1 pair

of flowers

1004 2nd pair of flowers 3 nodes/2

pairs of
flowers

1006 3rd pair of flowers 5 nodes/3

pairs of
flowers

30-60 cm +/- 25-31 d

10 pairs of flowers nodes/pairs

of flowers

Active growth
(from end of
planting to
early flowering)

1 T of MS all
of 120° Cj
either 1T/
week

From 25-31 d
to 49-65 d

Flowering and
formation of
the seed

Flowering

2000 Point of change Alternating

leaves

2001 Flower buds

2300 Formation of

female flowers

1st pistillate
flower

From 25-31 d
to 49-65 d

800° Cj
(early or
late
sowing) to
1100° Cj
(medium
seedlings)

First flowering

2301 First female flower 1st styles

visible

Continued