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AgriMet
The Pacific Northwest Cooperative
Agricultural Weather Network
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Definitions of Crop Start, Cover and Terminate Dates used by AgriMet
ALFALFA PEAK
Start Date: Vegetative Growth Begins
Cover Date: First Sign of Bloom
Terminate Date: First Killing Frost in Fall (<25 Deg F)
ALFALFA MEAN
Start Date: Vegetative Growth Begins
Cover Date: First Sign of Bloom
Terminate Date: First Killing Frost in Fall (<25 Deg F)
APPLES
Start Date: Full Bloom
Cover Date: Full Canopy
Terminate Date: 3-4 Weeks after Harvest
ASPARAGUS
Start Date: 2 Feet Tall
Cover Date: Row Closure
Terminate Date: Mid-October
BEANS
Start Date: 100% Emergence
Cover Date: Full Bloom
Terminate Date: Vines & Leaves are Dead
BEETS
Start Date: 100% Emergence
Cover Date: Full Canopy Between Rows (In Good Areas Of Field)
Terminate Date: Harvest
BLUEBERRIES
Start Date: 1st Leaf Opens
Cover Date: 100% Blue Fruit
Terminate Date: Mid-October
BLUEGRASS
Start Date: Green Up, About 2 Weeks Before Alfalfa
Cover Date: Heading Begins
Terminate Date: Harvest
BLUEGRASS ESTABLISHED
Start Date: Green Up, About 2 Weeks Before Alfalfa
Cover Date: Heading Begins
Terminate Date: Harvest
BLUEBERRIES
Start Date: 1st Leaf Opens
Cover Date: 100% Blue Fruit
Terminate Date: Mid-October
BROCCOLI
Start Date: Cotyledons Unfolding (100% Emergence)
Cover Date: Visible Head; Beginning Enlargement
Terminate Date: Harvest
CABBAGE
Start Date: 1st True Leaf (100% Emergence)
Cover Date: Biggest Leaves 0-45 Degree Angle to Ground
Terminate Date: Harvest
CARROT SEED 96
Start Date: 100% Emergence
Cover Date: 50% Heading
Terminate Date: Harvest
CARROT SEED 93
Start Date: 100% Emergence
Cover Date: 50% Heading
Terminate Date: Harvest
CHERRIES - COVER
Start Date: Leaf Out (occurs rapidly after bloom)
Cover Date: Full Canopy
Terminate Date: 3-4 Weeks after Harvest
CHERRIES - NO COVER
Start Date: Leaf Out (occurs rapidly after bloom)
Cover Date: Full Canopy
Terminate Date: 3-4 Weeks after Harvest
CONCORD GRAPES
Start Date: Bud Break
Cover Date: Full Canopy
Terminate Date: Killing Frost
CORN
Start Date: 100% Emergence
Cover Date: 50% Tasseled
Terminate Date: Field Corn (Grain) - Leaves And Stems Are Dead
Field Corn (Silage) - Harvest
Sweet Corn - Harvest
CRANBERRIES
Start Date: Break Dormancy
Cover Date: Berry Set
Terminate Date: End of Harvest (About 11/1)
GARLIC
Start Date: 100% Emergence
Cover Date: 50% of Stand has 12-13 Leaves
Terminate Date: One Week Prior to Harvest (Leaves Dead)
GRASS HAY
Start Date: Break Dormancy
Cover Date: Heading
Terminate Date: Killing Frost
HOPS
Start Date: Vine Growth Begins
Cover Date: Top of Trellis
Terminate Date: Vines and Leaves are Dead
LAWN
Start Date: Break Dormancy
Cover Date: Full Canopy
Terminate Date: 1st Killing Frost
ONIONS/GARLIC
Start Date: 100% Emergence
Cover Date: 50% of Stand has 12-13 Leaves
Terminate Date: One Week Prior to Harvest (Leaves Dead)
PASTURE
Start Date: Vegetative Growth Begins - About 2 Weeks Before Alfalfa
Cover Date: Heading
Terminate Date: 1st Killing Frost in the Fall (<25 Deg F)
PEARS
Start Date: Full Bloom
Cover Date: Full Canopy
Terminate Date: 3-4 Weeks after Harvest
PEAS
Start Date: 100% Emergence
Cover Date: Full Bloom
Terminate Date: Leaves and Stems are Dead
PEPPERMINT (NMPI)
Start Date: Vegetative Growth Begins - Approx. 2 Weeks after Alfalfa
Cover Date: Full Canopy
Terminate Date: Harvest (Nampa terminate Date Is Dormancy)
PEPPERMINT
Start Date: Vegetative Growth Begins-Approx. 2 Weeks After Alfalfa
Cover Date: Full Canopy
Terminate Date: Harvest
PEPPERMINT (OSU)
Start Date: Vegetative Growth Begins-Approx. 2 Weeks After Alfalfa
Cover Date: Full Canopy
Terminate Date: Harvest
PEPPERMINT (NEW)
Start Date: Vegetative Growth Begins-Approx. 2 Weeks After Alfalfa
Cover Date: Full Canopy
Terminate Date: Harvest (Nampa terminate Date Is Dormancy)
POPLAR 1
Start Date: Bud Break
Cover Date: Full Leaf
Terminate Date: Killing Frost
POPLAR 2
Start Date: Bud Break
Cover Date: Full Leaf
Terminate Date: Killing Frost
POPLAR 3+
Start Date: Bud Break
Cover Date: Full Leaf
Terminate Date: Killing Frost
POTATOES
Start Date: 100% Emergence
Cover Date: Full Canopy Between Rows (in Good Areas of Field)
Terminate Date: Vines are Dead
POTATOES (SHEPODY)
Start Date: 100% Emergence
Cover Date: Full Canopy Between Rows (In Good Areas Of Field)
Terminate Date: Vines Are Dead
RAPE
Start Date: 100% Emergence
Cover Date: 50% Heading
Terminate Date: Leaves & Stems are Dead
SAFFLOWER
Start Date: 100% Emergence
Cover Date: 50% Heading
Terminate Date: Leaves & Stems are Dead
SPEARMINT
Start Date: Break Dormancy
Cover Date: Full Canopy
Terminate Date: Harvest
SPRING GRAIN
Start Date: 100% Emergence
Cover Date: 50% Heading
Terminate Date: Leaves & Stems Are Dead
STRAWBERRIES
Start Date: Vegetative Growth Begins-Same Date As Alfalfa
Cover Date: Full Bloom
Terminate Date: 1st Killing Frost In Fall
SUGAR BEETS
Start Date: 100% Emergence
Cover Date: Full Canopy Between Rows (In Good Areas Of Field)
Terminate Date: Harvest
TRAILING BERRIES
Start Date: 1st Leaf Opens
Cover Date: Full Bloom
Terminate Date: Mid-October
WINE GRAPES
Start Date: Bud Break
Cover Date: Full Canopy
Terminate Date: Killing Frost
WINTER GRAIN
Start Date: Vegetative Growth Begins-Approx. 10 Days Before Alfalfa
Cover Date: 50% Heading
Terminate Date: Leaves & Stems Are Dead
See
About Crop Water Use Charts for more information.
