The UVM Apple Program:
Extension and Research for the commercial tree fruit grower in Vermont and beyond...
[Note: The source of the following pictures is: 'Growth Stages in
Fruit Trees', New York Food and Life Sciences Bulletin, No. 58, February 1976, New York
State Agricultural Experiment Station, Geneva, NY]
Dormant Silver Tip
Green Tip Half Inch Green
Criteria: When 50% of non-spur McIntosh buds appear as the above pictures. Please note that Green Tip should be viewed from the side -- in other words, do not look straight down into the bud to see if you can see green tissue.
Pink Full Bloom
Criteria: Pink -- when 60-70% of Blossoms are as shown on non-spur McIntosh
Full Bloom -- when 60-80% of fruit buds are in bloom on non-spur McIntosh
Criteria: Petal Fall -- two stages are important as 'biofixes' -- 95% Petal Fall (when 5% of fruit buds still have their blossoms) and 100% Petal Fall (when, for all purposes, petal fall is complete, i.e., can have a few petals left on tree)