Helena, Montana. 
HARDY PERENNIALS AND ALPINES 31 
Our Hardy Rock Garden Plants 
How to Make a Rock Garden 
SITE OR LOCATION 
The rock garden should be constructed in a spot that is subject to full light and to good aeration. 
Any natural slope in the ground can also be used to good advanatge. Take advantage of any natural 
outcropping or rock on your grounds. 
ROCKS 
Rocks will usually be gathered from the nearest and most easily accessible source. Weatherworn 
rocks produce a pretty and natural effect, and on rather sharp sloping ledges the use of porous and 
water-holding rocks is much in order because it is in these positions that the conservation of moisture 
is a large factor. Go to both extremes in choosing rock sizes as too many rocks of either a large or 
small size tend to make the effect unnatural. 
SOIL 
A good well drained garden loam is fine for a majority of rock garden plants, a soil made up of one- 
half loam as free from clay as possible, one-quarter leaf mold and one-quarter sand, is ideal. 
CONSTRUCTION 
The soil should be thoroughly prepared first and then the existing grades and the desired contours 
should be laid out in proportion. The bottom rocks should be placed first and there should be more 
plant surface than there are rocks in the finished effect. Anchor the rocks firmly by thorough tamp¬ 
ing. Arrange rocks on slopes so that as much erosion by water is checked as possible and so that 
there will be plenty of light and air for plants that are planted on a slope. 
PLANTING 
The best time to plant is in the Spring, although many of the hardy rock plants can be trans¬ 
planted equally as successfully in the Pall under our Montana conditions. If you are in doubt as to 
which plants to use for Fall planting just drop us a line and we shall be glad to advise you. Any 
of the plants may be set out in the Spring. 
ADVANTAGE OF OUR EXPERIENCE IN MONTANA AND NORTHWEST 
We are ready to help you at any time with your rock garden ventures. Our 44 years’ experience 
of growing and selection under conditions found in Montana and the Northwest gives you something 
no other firm can offer you. Following is a list of rock garden plants which are adaptable to condi¬ 
tions in Montana and the Northwest and for complete descriptions turn back through the Perennial sec¬ 
tion of this Year Book to the pages indicated. 
A Model Rock Garden In Our Nursery 
Description 
Name See Page 
Alyssum Saxatile—Gold Tuft . 22 
Arabis Alpina—Rock Cress . 22 
Arenaria—Caespitosa . 22 
Armeria Formosa—Sea Pink . 22 
Aubretia—Rainbow Rock Cress . 22 
Campanula Rotundifolia Olympica. 23 
Cerastium-Tomentosum—Snow in Summer . 23 
Campanula-Carpatica—Harebell . 23 
Cherianthus—Siberian Wallflower . 23 
Delphinium-—Chinense . 24 
Dianthus—Cheddar Pink . 24 
Dianthus—Red Montana . 24 
Dianthus—Hardy Grenadine . 24 
Dianthus Plumarius—Clove Pinks . 24 
Dianthus—Highland Queen . 24 
Dianthus-Deltoides . 24 
Edelweiss-Alpinum . 24 
Ferns—Hardy . 25 
Geum—Mrs. Bradshaw . 25 
Geum—Lady Stratheden . 25 
Helianthemum—Rock Rose . 25 
Heuchera—Coral Bells . 25 
Iberis Sempervirens . 25 
Iceland Poppy . 26 
Iris Pumila Cyanea—Dwarf . 26 
Lysimachia—Creeping Jenny .J. 27 
Lily of the Valley . 27 
Llnum—Blue Flax . 26 
OUR SPECIAL 
COLLECTION OF 
ROCK GARDEN 
PLANTS 
12 Different 
Pot Plants 
All Named 
Selected by Us 
Delivery Charges 
Prepaid 
$2.25 
-+ 
Price 
Three 
Each 
For 
25c 
65c 
25c 
65c 
30c 
75c 
25c 
65c 
25c 
65c 
35c 
90c 
25c 
65c 
30c 
75c 
25c 
65c 
30c 
75c 
25c 
65c 
30c 
75c 
25c 
65c 
25c 
65c 
25c 
65c 
25c 
65c 
30c 
75c 
35c & 65c 
25c 
65c 
25c 
65c 
25c 
65c 
25c 
65c 
25c 
65c 
25c 
65c 
20c 
50c 
25c 
65c 
3 for 25c 
25c 
25c 
65c 
