Conifers Summary

Conifers - Description of Terms - Summary Information - Approved Lists

CONIFERS: Summary of Specification Criteria

This table gives information typically used in the specification of conifers. 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 conifers but there are always well grown and health 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.

CO2

CO3

CO4

CO5

CO6

CO7

AGE/CONDITION or x TRANSPLANTED

OVERALL HEIGHT

GIRTH

ROOT PROTECTION

SIZE OF CONTAINER

HABIT

NOTES

in cms

RC = root collar (mm)
SD = stem dia. (mm)
G = girth (cm)

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

MIN SIZE/RANGE given in LITRES unless otherwise indicated

Root collar measures only apply for seed raised trees up to 60 cm height

1+0 or 1/0

10-15, 15-20, 20-25, 25-30,

RC: 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5

B

Forestry seedlings
e.g. Pinus sylvestris , Pinus nigra, Picea abies, Picea sitchensis, Tsuga heterophylla

1+0 or 1/0

10-15, 15-20, 20-25, 25-30,

RC: 2, 3, 4,

C

100, 125, or 235 cc.

Forestry seedling grown in Japanese Paper pots,

1+0 or 1/0

10-20, 20-40,
40-60, 60-90

RC: 3, 4, 6, 8

Ce

50, 100, 200cc

Forestry seedlings: e.g. Pinus nigra, Pinus sylvestris, Picea abies , Picea sitchensis

1+0= or 1/0=

10-15, 15-20, 20-25, 25-30,

RC: 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5

B

Forestry seedlings: Not so commonly grown

1u1

25-30, 30-40,

RC: 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5

B

Forestry seedlings: Not so commonly grown

2+0 or 2/0

30-40, 40-50, 50-60, 60-80

RC: 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5

B

Forestry seedlings: Not so commonly grown

2u2

30-40, 40-50, 50-60, 60-80

RC: 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5

B

Forestry seedlings: Not so commonly grown

1+1 or 1/1

25-30, 30-40, 40-50, 50-60, 60-80

RC: 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5

B

Forestry transplants:
e.g. Pinus sylvestris, Pinus nigra, Picea abies, Picea sitchensis, Tsuga heterophylla

1+2 or 1/2

25-30, 30-40, 40-50, 50-60, 60-80

B

Forestry transplants:
e.g. Pinus sylvestris, Pinus nigra, Picea abies, Picea sitchensis, Tsuga heterophylla

2+1 or 2/1

30-40, 40-50, 50-60, 60-80

RC: 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5

B

Forestry transplants: Not so commonly grown

2+2 or 2/2

30-40, 40-50, 50-60, 60-80

RC: 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5

B

Forestry transplants: Not so commonly grown

2 - 4 x

Height or spread: 40-50, 50-60, 60-70, 70-80, 80-90, 90-100, 100-125,

RB (3x girth at the root collar)

Bushy;

Dwarf/bushy types e.g. Chamaecyparis obtusa 'Nana Gracilis', Juniperus squamata 'Blue Star', Picea glauca 'Alberta Globe',
Pinus mugo pumilio

4 - 6 x

Height or spread: 125-150, 150-175, 175-200, above 200 in 50 cm. Steps.

RB (3x girth at the root collar)

Bushy;

Dwarf/bushy types: e.g. Chamaecyparis obtusa 'Nana Gracilis', Juniperus squamata 'Blue Star', Picea glauca 'Alberta Globe', Pinus mugo pumilio

2 - 4 x

Height: 60-70, 70-80, 80-90, 90-100, 100-125

RB (3x girth at the root collar)

Branched;

Prostrate: medium/vigorous : e.g. Juniperus horizontalis cvs., Juniperus x media 'Pfitzeriana'

2 - 4 x

Height: 60-70, 70-80, 80-90, 90-100, 100-125

RB (3x girth at the root collar)

Leader and Laterals; Single Leader (furnished to base);

Upright growing: medium: e.g. Chamaecyparis lawsoniana 'Ellwoodii'
Pinus mugo, Thuja occidentalis 'Rheingold',
Taxus baccata 'Fastigiata'

4 - 6 x

Height: 125-150, 150-175, 175-200, 200-225, 225-250, 250-275, 275-300

RB (3x girth at the root collar)

Leader and Laterals; Single Leader (furnished to base);

Upright growing: medium: e.g.Chamaecyparis lawsoniana 'Ellwoodii'
Pinus mugo, Thuja occidentalis 'Rheingold',
Taxus baccata 'Fastigiata'

2 - 4 x

Height: 60-80, 80-100, 100-125, 125-150

RB (3x girth at the root collar)

Leader and Laterals; Single Leader (furnished to base);

Upright growing: vigorous: e.g. Cedrus libani; Chamaecyparis lawsoniana; x Cupressocyparis leylandii; Thuja plicata + cvs.

4 - 6 x

Height: 150-175, 175-200, 200-250, 250-300, 300-350, 350-400

RB (3x girth at the root collar)

Leader and Laterals; Single Leader (furnished to base);

Upright growing: vigorous: e.g. Cedrus libani; Chamaecyparis lawsoniana; x Cupressocyparis leylandii; Thuja plicata + cvs.

Height and Spread:
15-20, 20-30, 30-40

C

0.5, 1, 1.5, 2, 3, 4, 5, 7.5, 10, 15

Branched; Bushy;

Dwarf/prostrate types: e.g.
Chamaecyparis spp. (dia), Juniperus spp. (dia), Picea spp, Tsuga spp. (dia)

Height and Spread:
20-30, 40-50, 50-60, 60-70

C

0.5, 1, 1.5, 2, 3, 4, 5, 7.5, 10, 15

Leader and Laterals; Single Leader (furnished to base);

Upright growing: Medium and vigorous types: e.g. Abies spp., Cedrus spp., Chamaecyparis spp, .x Cupressocyparis spp., Juniperus spp.

G: 18-20; 20-25; 25-30; 30-35; 35-40; 40-45; 45-50; 50-60

RB (3x girth at 1 metre)

Limited number of Semi Mature conifers grown in Standard form: e.g. Pinus spp.

CO8

OTHER DETAILS

Where appropriate other criteria can be specified. The following are examples:

Criterion

Qualification

Notes

Origin/Provenance

British grown

British provenance

Local provenance

Refer to Part 1. Note that British grown is not reliably British provenance or origin

Shape

Cone
Sphere
Spiral
Columns
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 conifers. Taxus spp.

CO2	CO3	CO4	CO5	CO6	CO7
AGE/CONDITION or x TRANSPLANTED	OVERALL HEIGHT	GIRTH	ROOT PROTECTION	SIZE OF CONTAINER	HABIT	NOTES
	in cms	RC = root collar (mm) SD = stem dia. (mm) G = girth (cm)	B = bagged (bareroot) Ce = cell grown RB = rootball C = container	MIN SIZE/RANGE given in LITRES unless otherwise indicated		Root collar measures only apply for seed raised trees up to 60 cm height
1+0 or 1/0	10-15, 15-20, 20-25, 25-30,	RC: 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5	B			Forestry seedlings e.g. Pinus sylvestris , Pinus nigra, Picea abies, Picea sitchensis, Tsuga heterophylla
1+0 or 1/0	10-15, 15-20, 20-25, 25-30,	RC: 2, 3, 4,	C	100, 125, or 235 cc.		Forestry seedling grown in Japanese Paper pots,
1+0 or 1/0	10-20, 20-40, 40-60, 60-90	RC: 3, 4, 6, 8	Ce	50, 100, 200cc		Forestry seedlings: e.g. Pinus nigra, Pinus sylvestris, Picea abies , Picea sitchensis
1+0= or 1/0=	10-15, 15-20, 20-25, 25-30,	RC: 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5	B			Forestry seedlings: Not so commonly grown
1u1	25-30, 30-40,	RC: 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5	B			Forestry seedlings: Not so commonly grown
2+0 or 2/0	30-40, 40-50, 50-60, 60-80	RC: 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5	B			Forestry seedlings: Not so commonly grown
2u2	30-40, 40-50, 50-60, 60-80	RC: 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5	B			Forestry seedlings: Not so commonly grown
1+1 or 1/1	25-30, 30-40, 40-50, 50-60, 60-80	RC: 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5	B			Forestry transplants: e.g. Pinus sylvestris, Pinus nigra, Picea abies, Picea sitchensis, Tsuga heterophylla
1+2 or 1/2	25-30, 30-40, 40-50, 50-60, 60-80		B			Forestry transplants: e.g. Pinus sylvestris, Pinus nigra, Picea abies, Picea sitchensis, Tsuga heterophylla
2+1 or 2/1	30-40, 40-50, 50-60, 60-80	RC: 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5	B			Forestry transplants: Not so commonly grown
2+2 or 2/2	30-40, 40-50, 50-60, 60-80	RC: 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5	B			Forestry transplants: Not so commonly grown
2 - 4 x	Height or spread: 40-50, 50-60, 60-70, 70-80, 80-90, 90-100, 100-125,		RB (3x girth at the root collar)		Bushy;	Dwarf/bushy types e.g. Chamaecyparis obtusa 'Nana Gracilis', Juniperus squamata 'Blue Star', Picea glauca 'Alberta Globe', Pinus mugo pumilio
4 - 6 x	Height or spread: 125-150, 150-175, 175-200, above 200 in 50 cm. Steps.		RB (3x girth at the root collar)		Bushy;	Dwarf/bushy types: e.g. Chamaecyparis obtusa 'Nana Gracilis', Juniperus squamata 'Blue Star', Picea glauca 'Alberta Globe', Pinus mugo pumilio
2 - 4 x	Height: 60-70, 70-80, 80-90, 90-100, 100-125		RB (3x girth at the root collar)		Branched;	Prostrate: medium/vigorous : e.g. Juniperus horizontalis cvs., Juniperus x media 'Pfitzeriana'
2 - 4 x	Height: 60-70, 70-80, 80-90, 90-100, 100-125		RB (3x girth at the root collar)		Leader and Laterals; Single Leader (furnished to base);	Upright growing: medium: e.g. Chamaecyparis lawsoniana 'Ellwoodii' Pinus mugo, Thuja occidentalis 'Rheingold', Taxus baccata 'Fastigiata'
4 - 6 x	Height: 125-150, 150-175, 175-200, 200-225, 225-250, 250-275, 275-300		RB (3x girth at the root collar)		Leader and Laterals; Single Leader (furnished to base);	Upright growing: medium: e.g.Chamaecyparis lawsoniana 'Ellwoodii' Pinus mugo, Thuja occidentalis 'Rheingold', Taxus baccata 'Fastigiata'
2 - 4 x	Height: 60-80, 80-100, 100-125, 125-150		RB (3x girth at the root collar)		Leader and Laterals; Single Leader (furnished to base);	Upright growing: vigorous: e.g. Cedrus libani; Chamaecyparis lawsoniana; x Cupressocyparis leylandii; Thuja plicata + cvs.
4 - 6 x	Height: 150-175, 175-200, 200-250, 250-300, 300-350, 350-400		RB (3x girth at the root collar)		Leader and Laterals; Single Leader (furnished to base);	Upright growing: vigorous: e.g. Cedrus libani; Chamaecyparis lawsoniana; x Cupressocyparis leylandii; Thuja plicata + cvs.
	Height and Spread: 15-20, 20-30, 30-40		C	0.5, 1, 1.5, 2, 3, 4, 5, 7.5, 10, 15	Branched; Bushy;	Dwarf/prostrate types: e.g. Chamaecyparis spp. (dia), Juniperus spp. (dia), Picea spp, Tsuga spp. (dia)
	Height and Spread: 20-30, 40-50, 50-60, 60-70		C	0.5, 1, 1.5, 2, 3, 4, 5, 7.5, 10, 15	Leader and Laterals; Single Leader (furnished to base);	Upright growing: Medium and vigorous types: e.g. Abies spp., Cedrus spp., Chamaecyparis spp, .x Cupressocyparis spp., Juniperus spp.
		G: 18-20; 20-25; 25-30; 30-35; 35-40; 40-45; 45-50; 50-60	RB (3x girth at 1 metre)			Limited number of Semi Mature conifers grown in Standard form: e.g. Pinus spp.