Helena, Montana. 
HARDY PERENNIALS AND ALPINES 33 
Our Hardy Rock Garden Plants 
How to Make a Rock Garden 
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 advantage. Take ad¬ 
vantage of any natural outcropping of rock on 
your grounds. 
Rocks will usually be gathered from the near¬ 
est and most easily accessible source. Weather¬ 
worn rocks produce a pretty and natural effect, 
and on rather sharp sloping ledges the use of 
porous and water-holding rocks is much in or¬ 
der because it is in these positions that the con¬ 
servation 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. 
A good well drained garden loam is fine for a 
majority of rock garden plants. 
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 anchor 
the rocks firmly by thorough tamping. Arrange 
rocks on slopes so that erosion by water is 
checked and so there will be plenty of light 
and air for the plants. 
A Model Rock Garden at Our Nursery 
The best time to plant is in the Spring, although many of the hardy pot grown rock plants can be 
transplanted equally as successfully in the Fall under 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. 
We are ready to help you at any time with your rock garden ventures. Our 46 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 conditions 
in Montana and the Northwest and for complete descriptions turn back through the Perennial section of 
this Year Book to the pages indicated. 
Name 
Alyssum Saxatile—Gold Tuft . 
Arabis Alpina—Rock Cress . 
Arenaria—Caespitosa . 
Armeria Formosa—Sea Pink . 
Aubretia—Rainbow Rock Cress . 
Campanula Rotundifolia Olympica . 
Cerastium-Tomentosum—Snow in Summer 
Campanula-Carpatica—Harebell . 
Cherianthus—Siberian Wallflower . 
Delphinium—Chinense . 
Dianthus—Cheddar Pink ...... 
Dianthus—Red Montana . 
Dianthus—Hardy Grenadine . 
Dianthus Plumarius—Clove Pinks . 
Dianthus—Highland Queen .. 
Dianthus-Deltoides . 
Edelweiss-Alpinum . 
Ferns—Hardy . 
Geum—Mrs. Bradshaw . 
Geum—Lady Stratheden ._. 
Helianthemum—Rock Rose . 
Heuchera—Coral Bells ... 
Iberis Sempervirens . 
Iceland Poppy . 
Iris Pumila Cyanea—Dwarf Purple . 
Lysimachia—Creeping Jenny . 
Lily of the Valley . 
Linum—Blue Flax .^. 
Monardo—Didyma Rosea . 
Monarda—Didyma Cambridge Scarlet . 
Myosotis—Forget-Me-Not . 
Nepeta-Mussini . 
Nepeta—Nervosa . 
Pensteman—Blue Gem . 
Platycodon—Balloon Flower . 
Phlox—Subulata .. 
Phlox—Coerulia—Blue Flowers . 
Plumbago-Larpentae . 
Primula-Auricula . 
Primula-Polyanthus . 
Sedum—Album . 
Sedum Coccineum . 
Stokesia-Cyanea . 
Trollius .. 
Veronica-Speedwell . 
Veronica-Repens . 
Veronica-Incana .. 
Viola . 
escrlption 
Price 
Three 
See Page 
Each 
For 
24 
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3 for 25c 
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IIU—llll— mi——llll— 
30c 
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75c 
tin—mi—uu— 
OUR SPECIAL ROCK GARDEN PLANT COLLECTION 
1 o Strong potted plants, different varieties, selected by us, 
all named, for only . 
Prepaid to You 
(A Wonderful Gift for Your Garden Loving Friends) 
$ 1.95 
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