Trees Summary

Trees - Description of Terms - Summary Information - Approved Lists

TREES - Summary of Specification Criteria T1.2

Summary of specification criteria

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 methods of its productions are important in specifying plants.

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

T2

T3

T4

T5

T6

T7

T8

T9

T10

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 in cms

Given as a range or minimum in cms

B = bagged (bareroot)
Ce = cell grown
RB = rootball
C = container

Minimum size or range given in LITRES unless 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= < /P>

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

T11

OTHER DETAILS

Criterion

Qualification

Notes

Origin/Provenance

British Grown

British Provenance

Local Provenance

Refer to T10.2 Origin and 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

Espalier

Fan

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.

T2	T3	T4	T5	T6	T7	T8	T9	T10
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 in cms	Given as a range or minimum in cms	B = bagged (bareroot) Ce = cell grown RB = rootball C = container	Minimum size or range given in LITRES unless 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= < /P>	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


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

Criterion	Qualification	Notes
Origin/Provenance	British Grown British Provenance Local Provenance	Refer to T10.2 Origin and 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 Espalier Fan 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.