| Code | Definition | Number of Accessions |
| 1 | the earliest species -16 to -20 days before | 3 |
| 2 | very early species -11 to -15 days before | 6 |
| 3 | spec. and very early cultivars - 6 to -10 days before | 7 |
| 4 | very early cvs. - 1 to - 5 days before | 14 |
| 5 | early cvs. 0 to + 5 days before | 40 |
| 6 | medium early cvs. + 6 to +20 later | 24 |
| 7 | little later cvs. +11 to +15 later | 15 |
| 8 | late cvs. and spp. +16 to +20 later | 5 |
| 9 | very late cvs. and spp. > + 20 later | 3 |