Skip to main content
Freshly picked red apples in wooden crate with warm glow behind
Whenua considerations

Grow Degree Days (GDD) under climate change

  • Growing degree days (GDD), or heat units, are used to estimate the growth and development of certain crops and pests during the growing season.

    The dataset - What is it?

    GDD are the total number of degrees Celsius that the mean daily temperature is above a base threshold temperature (10 degrees Celsius) in a year.

    This data set presents a series of maps that show how the frequency of the growing degree days may alter for a mid-century and an end of century timeframe under various climate change scenarios.

    Why it's important

    GDD can be a useful tool for farmers, gardeners, and researchers to predict plant growth and development, and make informed decisions about when to plant, fertilize, and harvest their crops.

    • How to use this information safely

      • Fitness for purpose / limitations

        This table indicates whether the dataset is suitable for different types of questions at different scales.

        Note: Users should carefully consider their purpose as this dataset may not be suitable.

         

        Operational

        Absolute

        Relative

        Screening/scoping

        Block/farm

        No

        No

        No

        Maybe

        Multi-farms(5+)

        Maybe

        Maybe

        Maybe

        Yes

        Catchment

        Yes

        Yes

        Yes

        Yes

        National/regional

        Yes

        Yes

        Yes

        Yes

        Caveats

        The climate information is too coarse for use at finer scales.

        How to interpret this table (opens in a new tab)

Read more about...
Grow Degree Days (GDD) under climate change (opens in a new tab)
  • Please note:

    You can use this information to help form an understanding of how Growing Degree Days may impact on a land use option in your rohe (locality). However, you should seek further advice from a suitably qualified person before making land-use decisions.

Back

Locate and explore different uses for your whenua

Tell us a bit about your whenua and priorities you and your whānau hold. Our tool will present some different uses for your whenua that may help you achieve these.

Explore your options
Phone screen showing the Area suitability tab for blueberries on a whenua, with a hatched land block on a map and the rating Well suited. Phone screen showing the Whenua uses step with a map of a land block and cards for blueberries and apples with suitability stars. Phone screen showing the Whenua potential tab explaining Land Use Capability, above a map of a land block. Phone screen showing the Taiao section with cards for Whenua and Wai, above the Be Inspired stories. Phone screen showing the Be Inspired stories with filters and cards for Miro Berries and Minginui Nursery.
Share discoveries
Your PDF is Processing

A new tab will open shortly and will take approximately 30 seconds to generate your PDF. Please Do Not close your browser.