Potato Growth Stage
POTATOES |
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| Growth stage | Code | Description | |
| 2 digit | 3 digit | ||
| 0: Sprouting/Germination | |||
| 00 | 000 | Innate of enforced dormancy, Dry seed tuber not sprouted | |
| 01 | 001 | Beginning of sprouting: Beginning of sprouts visible (<1mm) seed imbibition |
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| 02 | 002 | Sprouts upright (<2mm) | |
| 03 | 003 | End of dormancy: sprouts 2-3 mm Seed imbibition complete | |
| 05 | 005 | Beginning of root formation Radicle (root) emerged from seed | |
| 07 | 007 | Beginning of stem formation Hypocotyl with cotyledons breaking | |
| 08 | 008 | Stems growing towards soil surface, Hypocotyl with formation of scale leaves in the axils; |
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| Cotyledons growing of which stolons will develop later towards soil surface |
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| 09 | 009 | Emergence: stems break through soil surface; cotyledons break through soil surface |
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| 021-0291 | |||
| 1: Leaf development | |||
| 10 | 100 | From tuber: first leaves begin to extend | |
| From seed: cotyledons completely unfolded | |||
| 11 | 101 | First leaf of main stem unfolded (>4cm) | |
| 12 | 102 | Second leaf of main stem unfolded (>4cm) | |
| 13 | 103 | Third leaf main stem unfolded (>4cm) | |
| 1 | 10 | Stages continuous still | |
| 19 | 109 | Nine or more leaves of main stem unfolded (>4cm)(2 digit); | |
| 9 | 2 leaves of main stem unfolded (>4cm)(3 digit) | ||
| 110 | Tenth leaf of main stem unfolded (>4cm) | ||
| 11 | Stages continuous still | ||
| 119 | Nineteenth leaf of main stem unfolded (>4cm) | ||
| 121 | First leaf of second order branch above first inflorescence unfolded (>4cm) |
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| 122 | Second leaf of second order branch above first inflorescence unfolded (>4cm) |
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| 12 | Stages continuous still | ||
| 131 | First leaf of of third order branch above second inflorescence unfolded (>4cm) |
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| 132 | Second leaf of third order branch above second inflorescence unfolded (>4cm) |
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| 13 | Stages continuous still | ||
| 1NX | Xth leaf of nth order branch above (n-1)th inflorescence unfolded (>4cm) |
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| 2: Formation of basal side shoots below and above soil surface (main stem) | |||
| 21 | 201 | First basal side shoot visible (>5cm) | |
| 22 | 202 | Second basal side shoot visible (>5cm) | |
| 23 | 203 | Third basal side shoot visible (>5cm) | |
| 2 | 20 | Stages continuous still | |
| 29 | 209 | Nine or more basal side shoots visible (>5cm) | |
| 3: Main stem elongation (crop cover) | |||
| 31 | 301 | Beginning of crop cover: 10% of plants meet between rows | |
| 32 | 302 | 20% of plants meet between rows | |
| 33 | 303 | 30% of plants meet between rows | |
| 34 | 304 | 40% of plants meet between rows | |
| 35 | 30 | 50% of plants meet between rows | |
| 36 | 306 | 60% of plants meet between rows | |
| 37 | 307 | 70% of plants meet between rows | |
| 38 | 308 | 80% of plants meet between rows | |
| 39 | 309 | Crop cover complete: about 90% of plants meet between rows | |
| 4: Tuber information | |||
| 40 | 400 | Tuber initiation: swelling of first stolon tips to twice the diameter of subtending stolon |
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| 41 | 401 | 10% of total final tuber mass reached | |
| 42 | 402 | 20% of total final tuber mass reached | |
| 43 | 403 | 30% of total final tuber mass reached | |
| 44 | 404 | 40% of total final tuber mass reached | |
| 45 | 405 | 50% of total final tuber mass reached | |
| 46 | 406 | 60% of total final tuber mass reached | |
| 47 | 407 | 70% of total final tuber mass reached | |
| 48 | 408 | Maximum of total tuber mass reached, tubers detatch easily from stolons, skin set not yet complete |
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| (Skin easily removable with thumb) | |||
| 49 | 409 | Skin set complete:(skin at apical end of tuber not removable with thumb) 95% of tubers in this stage |
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| 5: Inflorescence (cyme) emergence | |||
| 51 | 501 | First individual buds (1-2mm) of first inflorescence visible (main stem) | |
| 55 | 505 | Buds of first extended to 5mm | |
| 59 | 509 | First flower petals of first inflorescence visible | |
| 521 | Individual buds of second inflorescence visible (second order branch) | ||
| 525 | Buds of second inflorescence extended to 5mm open (main stem) | ||
| 529 | First flower petals of second inflorescence visible above sepals | ||
| 531 | Individual buds of third inflorescence visible (third order branch) | ||
| 535 | Buds of second inflorescence extended to 5mm | ||
| 539 | First flower petals of second inflorescence visible sepals | ||
| 5N. | Nth inflorescence emerging | ||
| 60 | 600 | First open flowers in population | |
| 61 | 601 | Beginning of flowering: 10% of flowers in the first inflorescence open (main stem) |
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| 62 | 602 | 20% of flowers in the first inflorescence open | |
| 63 | 603 | 30% of flowers in the first inflorescence open | |
| 64 | 604 | 40% of flowers in the first inflorescence open | |
| 65 | 605 | Full flowering: 50% of flowers in the first inflorescence open | |
| 66 | 606 | 60% of flowers in the first inflorescence open | |
| 67 | 607 | 70% of flowers in the first inflorescence open | |
| 68 | 608 | 80% of flowers in the first inflorescence open | |
| 69 | 609 | End of flowering in the first inflorescence | |
| 6: Flowering (continuation) | |||
| 621 | Beginning of flowering: 10% of flowers in the second inflorescence open (second order branch) |
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| 625 | Full flowering: 50% of flowers in the second inflorescence open | ||
| 629 | End of flowering in the 2nd inflorescence | ||
| 631 | Beginning of flowering: 10% of flowers in the second inflorescence open (third order branch) |
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| 635 | Full flowering: 50% of the flowers in the third inflorescence open | ||
| 639 | End of flowering in the third inflorescence | ||
| 6N. | Nth inflorescence flowering | ||
| 6N9. | End of flowering | ||
| 7: Development of fruit | |||
| 70 | 700 | First berries visible | |
| 71 | 701 | 10% of berries in the first fructification have reached full size (main stem) |
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| 72 | 702 | 20% of berries in the first fructification have reached full size | |
| 73 | 703 | 30% of berries in the first fructification have reached full size | |
| 7 | 70 | Stages continuous still | |
| 721 | 10% of berries in the second fructification have reached full size (second order branch) |
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| 7N | Development of berries in nth fructification | ||
| 7N9 | Nearly all berries in the nth fructification have reached full size (or have been shed) |
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| 8:Ripening of fruit and seed | |||
| 81 | 801 | Berries in the first fructification still green, seed light-coloured (main stream) |
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| 85 | 805 | Berries in the first fructification ochre-coloured or brownish | |
| 89 | 809 | Berries in the first fructification shrivelled, seed dark | |
| 821 | Berries in the second fructification still green, seed light-coloured (second order branch) |
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| 8N. | Ripening of fruit and seed in nth fructification | ||
| 9: Senescence | |||
| 91 | 901 | Beginning of leaf yellowing | |
| 93 | 903 | Most of the leaves yellowish | |
| 95 | 905 | 50% of the leaves brownish | |
| 97 | 907 | Leaves and stem dead, stems bleached and dry | |
| 99 | 909 | Harvested product | |
