Grape growing and Labelling Flashcards
How long can a vine live
60 years or more
Vine growing season explain high level seasonal activitys of the vine
Spring=Shoots form, leaves grow and flowers form
Summer=Flowers have transformed into fruit and by the end of summer are ripe ready for harvest.
Autum=The vines drop there leaves ending the growing season
Winter=The vines are dormant and dont grow
All wine is made from one European vine
Vitis vinifera usually on american root stock due to phylloxera
What five thing does a vine need
- Warmth
- Sunlight
- Carbon dioxide
- Water
- Nutrients
Key parts of the Grape
Stem
Skin
Pulp
Seeds
- Pulp is made of?
- Tannin comes from?
- Effects of stems and seeds?
-Pulp is Water/Sugar/Acid
-Good Tannin comes from the skins along with colour
-Stems and seeds also have tannins but can be very astringent and green
Key points on vine flowers
- Flowering happens in spring
- Each flower becomes a grape
- Flowers are self pollinating
- A group of grapes is known as a cluster
What is fruitset
- Once the flower is pollinated the flower starts to grow seeds and begins to swell.
- Its small, green, hard and bitter at this stage
What is Veraison
This generaly occurs mid summer, the grapes are large enough that the vine will start the ripening process.
What happens to the grape at ripening
- At the start they are very high in acid and no sugar, very herbaceouse
- They will swell with water, sugar rises and acid drops
- As the ripen herbaceous flavour drops and grape charachters develop
- Skins ripen and black grapes the tannins of the skin also ripen.
- Black grapes tannins must be ripe at harvest to avoid overly astringent wine
What is Extra Ripening
- The grape is left on the vine (can only be done with good weather)
- Sugar builds and moisture reduces
- Eventualy the grapes will become raisins, the acids and sugars become concentrated
What is Botrysis (the noble rot)
Its a fungus that grows on the grapes that creates minute holes that help concentrate sugars and acids.
Requires damp misty mornings for the growth to spread with dry afternoons to stop it destroying the grapes
Whats is climate
Its the average level of rainfall, temperature, sunlight that a region will typical expect
Note that the amount of heat available during the growing season is a key
What is considered a cool climate
Average growing season temperature of 16.5c or below
What is considered a moderate climate
Average growing season temp of 16.5c to 18.5c
What is considered a Warm climate
Average temperature of 18.5c to 21c