Welcome to the official website of the GPM program of the HU Berlin.
If you want to participate in the GPM program, please contact us by mail. Then, you will receive an access to the GPM database. As a registered member, you can manage your GPM station, add site information and edit your observations online.

Phases

[SL] Sprouting of Leaves (BBCH 7)

The leaf buds begin to open in at last 3 places on the object under observation. The first green is visible.
Abbreviation: SL

[UL] Beginning of Leaf Unfolding (BBCH 11)

In at least 3 places on the object under observation, first leaves have pushed themselves completely out of the bud or leaf sheath and have unfolded completely, so that the leaf stalk or leaf base is visible. This phase is sometimes only recognizable by bending back the young leaf. The individual leaf has taken on its ultimate form, but has not yet reached its ultimate size.
Abbreviation: UL

[BB] Bud Burst (BBCH 53)

The flower buds begin to burst in at least 3 places on the object under observation. The green leaf tips enclosing flowers are visibile.
Abbreviation: BB

[BF] Beginning of Flowering/Blossom (BBCH 60)

In at least 3 places on the object under observation the first flowers have opened completely. The stamens should be visible between the unfolded petals

Exceptions:
Snowdrops (Galanthus nivalis): the first 3 flowers have opened at plantation. The flower is considered open only when the outer leaves have spread and the green tip and stamens are visible.
Heather (Calluna vulgaris): on 3 places of the plantation the first flowers have opened completely.
Abbreviation: BF

[FF] Full (general) Flowering/Blossom (BBCH 65)

Approximately 50% of the flowers are open.
Abbreviation: FF

[EF] End of Flowering/Blossom (BBCH 69)

This phase occurs when the flowers have faded. In some existing networks “flowers have faded” is equated with “approximately 95 % of the total petals have fallen”. This rule is some different in formulation to the BBCH69 definition but in practice “de facto” identical.
Abbreviation: EF

[RF] First Ripe Fruits (BBCH 86)

The first ripe fruits of Almond and European Chestnut fall from the tree, naturally.
Exeption: Premature ripening should not be reported.
Abbreviation: RF

[RP] Fruit Ripe for Picking (BBCH 87)

The fruits show the colouring characteristic for their variety and can be removed easily from the fruiting lateral.
Exception: Premature ripening should not be reported.
Abbreviation: RP

[CL] Colouring of Leaves (BBCH 94)

Approximately 50 % of the leaves have taken on the colors of autumn. Colouring of leaves, caused by drought, should not be reported.



Abbreviation: CL

[FL] Falling of Leaves (BBCH 95)

Approximately 50 % of the leaves have fallen off. Falling of leaves, caused by drought, should not be reported.
Abbreviation: FL