Trees – Summary

This table gives information typically used in the specification of trees.  It is important to realise that plants are variable and growth varies between species and seasons.  For this reason, the details within the table give general, accepted dimensions and terms for the specification of tree but there are always well grown and healthy plants which are exceptions.  A knowledge of the product and the its production methods remains an important factor when specifying plants.

Values shown in bold type indicate the more typical for the range.

FORM AGE/CONDITION or x TRANSPLANTED GIRTH OVERALL HEIGHT CLEAR STEM ROOT PROTECTION SIZE OF CONTAINER  MIN NO. OF BKS/BRANCHES NOTES
RC = root collar (mm)
SD = stem dia. (mm)
G = girth (cm)
Height range or minimum height incms Given as a range or minimum in cms B = bagged (bareroot)
Ce = cell grown
RB = rootball
C = container
Minimum size or range given in LITRESunless otherwise indicated Root collar measures only apply for seed raised trees up to 60 cm height
Stem diameter applies only to 1-3 year old willows and poplars.
Seedlings 1+0 or 1/0 10-15, 15-20, 20-25, 25-30,30-40, 40-50, 50-60,60-80 B Sometimes grown LOW DENSITY to get a more robust plant
Seedlings 1+0 or 1/0 RC 4, 6 or 8 10-20, 20-40, 40-60, 60-90 Ce 50, 100, 150 or 200 cc. A useful forestry product
Seedlings
(undercut)
1+0= or 1/0= RC 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 11 10-15, 15-20, 20-25, 25-30,30-40, 40-50,
50-60,60-80
B Undercut during the first growing season
Seedlings (undercut) 1u1 RC 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 11 25-30, 30-40,40-50, 50-60, 60-80, 80-100 B Used for some trees which resent transplanting
Seedlings 2+0 or 2/0 RC 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 11 20-25, 25-30, 30-40, 40-50, 60-80, 80-100, 100-125 B Not commonly grown
Seedlings (undercut) 2u2 RC 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 11 20-25, 25-30, 30-40, 40-50, 60-80, 80-100, 100-125 B Not commonly grown
Cuttings 0/1 6-8, 8-10 40-50, 60-80, 80-100, 100-125 B Useful landscape product
Cuttings 0/2 8-10, 10-12, 60-80, 80-100, 100-125, 125-150 B Not so commonly grown
Transplants – seed raised
(Whip/ feathers)
1+1 or 1/1 RC 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 11 30-40, 40-50, 60-80,80-100, 100-125 B or C 1, 2-5 Useful landscape product
Transplants – seed raised
(Whips/feathers)
1+2 or 1/2 RC 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 11 30-40,40-50, 60-80, 80-100, 100-125, B or C 1, 2-5 Better for trees which dislike transplanting
Transplants – seed raised
(Whips/feathers)
1+2 or 1/2 125-150, 150-175, 175-200, 200-250 B or C 7.5, 15-25 Not common – usually transplanted again
Transplants – seed raised (Whips/feathers) 2+1 or 2/1 RC 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 11 40-50, 60-80, 80-100, 100-125 B or C 1, 2-5 Not common
Transplants – seed raised (Whips/feathers) 2+1 or 2/1 125-150, 150-175, 175-200, 200-250 B or C 7.5, 15-25 Not common
Transplants – seed raised (Whips/feathers) 2+2 or 2/2 RC 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 11 40-50, 60-80, 80-100, 100-125 B or C 1, 2-5 Not common
Transplants – seed raised (Whips/feathers) 2+2 or 2/2 125-150, 150-175, 175-200, 200-250 B or C 7.5, 15-25 Not common
Transplants – cutting raised
(Whip/ feather)
0/1/1 8-10, 10-12 60-80, 80-100, 100-125 B or C 2, 5 Typical whip (or feather)
Transplants – cutting raised
(Whip/ feather)
0/1/1 8-10, 10-12, 12-15, 15-20, 20+ 125-150, 150-175,175-200, 200-250 B or C 7.5, 15-25 Typical whip (or feather)
Transplants – cuttings raised
(Whip/feather)
0/1/2 60-80, 80-100, 100-125 B or C 2, 5
Transplants – cuttings raised
(Whip/feather)
0/1/2 125-150, 150-175, 175-200, 200-250 B or C 7.5, 15-25
Transplants – cuttings raised
(Whip/feather)
0/2/1 60-80, 80-100, 100-125 B or C 2, 5
Transplants – cuttings raised
(Whip/feather)
0/2/1 125-150, 150-175, 175-200,200-250 B or C 7.5, 15-25
Whip/Feather/maiden 2x 80-100, 100-125 B or C 5
Whip/maiden 2x 100-125 B or C 5 1
Whip/maiden 2x 125-150 B or C 7.5 1 or 2
Feather/maiden 2x 125-150 B or C 7.5 2, 3 or 5
Feather/maiden 2x 150-175 B or C 15 3 or 5
Feather/maiden 2x 175-200, 200-250 B or C 15-25 5 +
Feather 2x 6-8 250-300 B, RB or C 25-45 5 +
Feather 3x 8-10 250-300 B, RB or C 25-45 5 +
Feather 4x 10-12 300-350 B, RB or C 25-45 7 +
Standard (Half) 2x 4-6 175-250 125-150 B or C 25-45 3 or 4
Standard (Extra light) 2x 5-6 200-250 150-175 B or C 25-45 3, 4 or 5
Standard (Light) 2x 6-8 250-300 150-175 B or C 25-45 3, 4 or 5
Standard (Standard) 2x 8-10 250-300 175-200 B or C 25-45 3, 4 or 5
Standard (Selected) 2x 10-12 300-350 Min 200 B or C 25-45 4, 5 or 7
Standard (Heavy) 3x 12-14 350-425 Min 200 B, RB or C 45-85 5, 6 or 7
Standard (Extra Heavy) 3x 14-16 425-600 Min 200 B, RB or C 85-100, 100-300 5, 6 or 7
Standard 3x 16-18 450-625 Min 200 B, RB or C 85-100, 100-300
Standard 3x 18-20 450-650 Min 200 RB or C 85-100, 100-300
Standard 4x 20-25 Min 200 RB or C 85-100, 100-300
Standard (Semi-mature) 4x, 5x 25-30, 30-35,
35-40, 40-45,
45-50, 50-60
Min 200 RB or C 100-300, 300-600, 600-1000
Standard (Semi-mature) 4x, 5x, 6x 60-70, 70-80 Min 200 RB
Multi-Stem 3x, 4x 14-16, 16-18, 18-20 200-250, 250-300, 300-350, 350-400, 400-500, 500-600 RB or C 85-100, 100-300 2 stems min.
3 stems min.
5 stems min.
Bushy 3x, 4x 200-250, 250-300, 300-350, 350-400, 400-500, 500-600 RB or C 85-100, 100-300
Spacing

Trees should be spaced adequately in nursery beds appropriate to the size they will be sold at.

Spec Size Min space
2x 6/8-12/14 0.6m2
3x 12/14-16/18 1.0m2
3x 16/18-20/25 1.5m2
4x 20/25-40/45 3.0m2
5x >45/50 6.0m2
Multi >2m ht 2.0-4.0m2
Other details
Criterion Qualification Notes
Origin/Provenance British Grown/British Provenance/Local Provenance Note that British Grown is not reliably British Provenance or origin.
Top/Bottom work Top worked May apply particularly for weeping trees.
Shape Pleached/Pollard/Parasol/EspalierFan/Other shapes More detailed information on the other criteria necessary for the specification of these shapes (girth measures, branch lengths, root condition, size of container, etc.) can be obtained from the specialists who supply these trees.