Overall height Grades

Height Grades



Figure 1: 80-100 cm
height TRANSPLANT

 

cm	Form
10-15	Seedling
15-20	Seedling
20-25	Seedling
25-30	Seedling, transplant
30-40	Seedling, transplant
40-50	Seedling, cutting, transplant
50-60	Seedling, cutting, transplant
60-80	Seedling, cutting, transplant
80-100	Seedling, cutting, transplant
100-125	Seedling, cutting, transplant

For Cell grown trees and shrubs the following height grades are used:

cm	Form
10-20	Seedling
20-40	Seedling
40-60	Seedling
60-90	Seedling

Height Grades


Figure 2: 125-150 cm
height FEATHERED TREE

cm	Form of tree	Girth	Mark colour
80-100	whip/feathered		yellow
100-125	whip/feathered		white
125-150	whip/feathered		blue
150-175	whip/feathered		red
175-200	whip/feathered		yellow
200-250	whip/feathered		blue

 

 

 

 

 

For larger feathered trees (6-8 cm +) the girth grade becomes more significant in specification than the overall height.

The designation of Whip or Feathered form, depends on the characteristics of the species and the method of culture

Height Grades - Clear stem standards and larger feathered trees





Figure 3: 425-600 cm height, 1
4-16 cm girth STANDARD TREE
(Acer platanoides 'Emerald Queen')

cm	Form of tree	Girth	Mark colour
250-300	Light	6-8	blue
250-300	Standard	8-10	yellow
300-350	Selected	10-12	red
350-400	Heavy	12-14	white
400-450	Extra heavy	14-16	blue
450-500	Extra heavy	16-18	yellow
450-500	Extra heavy	18-20	red
500-550	Semi-mature	20-25	white
600-650	Semi-mature	25-30 & 30-35
700-750	Semi-mature	35-40 & 40-45
750-800	Semi-mature	45-50 & 50-60

 

 

Although height grades are given for these larger trees, the height becomes less significant. This should be used as a guide to choose and specify the correct girth of the trees.

 

 

Height Grades - Multi-stemmed and Bushy forms



Figure 4: 300-350 cm height
BUSHY TREE (Acer campestre)

 

cm	Form
200-250	Multi stem/bushy
250-300	Multi stem/bushy
300-350	Multi stem/bushy
350-400	Multi stem/bushy
400-500	Multi stem/bushy
500-600	Multi stem/bushy

 

 

Although multi stemmed and bushy trees are specified primarily by OVERALL HEIGHT (qualifying also the ROOT PROTECTION and the SIZE OF CONTAINER, if appropriate) they may also be specified by reference to the number of stems and/or main branches arising from or near ground level and also a measure of the diameter of the head. For example, Betula pendula is typically specified with 2 stems or with 3 stems. An indication of the girth of the thinnest or average stem may also be indicated.