Letham Shank Farm - Crops, Machinery and Livestock

 

Growth Stages in Cereals


The descriptions of the growth stages of the Zadoks decimal code for cereals.

0 Germination 5 Inflorescence (ear/panicle) emergence
00 Dry seed 50 --
01 Start of imbibition (water absorption) 51 First spikelet of inflorescence just visible
02 -- 52 --
03 Imbibition complete 53 1/4 of inflorescence emerged
04 -- 54 --
05 Radicle (root) emerged from caryopsis (seed) 55 1/2 of inflorescence emerged
06 -- 56 --
07 Coleoptile 57 3/4 of inflorescence emerged
08 -- 58 --
09 Leaf just at coleoptile tip 59 Emergence of inflorescence
1 Seedling growth 6 Anthesis (flowering)
10 First leaf through coleoptile 60 --
11 First leaf unfolded 61 Beginning of anthesis
12 2 leaves unfolded 62 --
13 3 leaves unfolded 63 --
14 4 leaves unfolded 64 --
15 5 leaves unfolded 65 Anthesis half-way
16 6 leaves unfolded 66 --
17 7 leaves unfolded 67 --
18 8 leaves unfolded 68 --
19 9 or more leaves unfolded 69 Anthesis complete
2 Tillering 7 Milk development
20 Main shoot only 70 --
21 Main shoot and 1 tiller 71 Caryopsis (kernel) water ripe
22 Main shoot and 2 tillers 72 --
23 Main shoot and 3 tillers 73 Early milk
24 Main shoot and 4 tillers 74 --
25 Main shoot and 5 tillers 75 Medium milk
26 Main shoot and 6 tillers 76 --
27 Main shoot and 7 tillers 77 Late milk
28 Main shoot and 8 tillers 78 --
29 Main shoot and 9 or more tillers 79 --
3 Stem elongation 8 Dough development
30 Pseudostem (leaf sheath) erection 80 --
31 First node detectable 81 --
32 2nd node detectable 82 --
33 3rd node detectable 83 Early dough
34 4th node detectable 84 --
35 5th node detectable 85 Soft dough
36 6th node detectable 86  
37 Flag leaf just visible 87 Hard dough
38 -- 88 --
39 Flag leaf ligule just visible 89 --
4 Booting 9 Ripening
40 -- 90 --
41 Flag leaf sheath extending 91 Caryopsis hard (difficult to divide)
42 -- 92 Caryopsis hard (not dented by thumbnail)
43 Boots just visibly swollen 93 Caryopsis loosening in daytime
44 -- 94 Over-ripe, straw dead and collapsing
45 Boots swollen 95 Seed dormant
46 -- 96 Viable seed giving 50% germination
47 Flag leaf sheath opening 97 Seed not dormant
48 -- 98 Secondary dormancy induced
49 First awns visible 99 Secondary dormancy lost

Growth Stages
Cereal Growth Stages (Zadoks)


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