To Enjoy Perennials of Unusual 
Beauty of Form and Color, Plant 
PFEIFFER’S IRIS 
Irises are undoubtedly one of the most popular of all 
the hardy perennials. No other perennials available to 
our gardens combine so many good qualities. They 
are inexpensive, extremely hardy, may be grown under 
a great variety of conditions with a minimum amount 
of care, and they have a wonderful range of colors from 
the lightest pale yellow to rich gold and deep bronze, 
delicate pale blues, and lavenders to dark blue and 
violet to deepest purple, light pink to claret and deep 
maroon, all the shades of lavender, mauve, violet and 
pure white, with an endless array of combination colors. 
Irises are easy to grow and can be planted almost 
any time the ground is not frozen. They will do best 
in a sunny, well drained location in a medium loose, 
mellow soil. Irises must be planted shallow; many 
people plant too deep and the plants rot. The rhizome 
or fleshy part of the root should be just under the sur¬ 
face of the ground. If your location is a low spot where 
water will stand, it is advisable to make raised beds, 
so the water cannot stand around the roots. Good 
drainage is necessary. If the soil is sour, an application 
of<hydrated lime is advisable. Never use manure. 
A Word About Plants and Prices 
Our prices are based on strong, single divisions, and we 
always send out the best plants available. It should be under¬ 
stood that while we strongly advise planting in July and 
August, the plants are not as large or well developed as they 
are in the fall, but it is to your advantage to have the plants 
make their growth in your garden rather than in our own. 
For southern states, better results might be obtained if Irises 
are planted in September or October. 
Mass Planting Advisable 
An Iris display in the garden is much more effective if they 
are planted in groups of from three to a dozen plants of each 
variety, and to stimulate an interest for mass planting, we are 
making attractively low prices by the dozen on many varieties. 
Collections 
Largely for the benefit of the beginner in Iris growing we are 
offering some exceptional collections and combinations listed 
on another page. For the Iris fancier who wants the best and 
knows just what he or she wants, we have a list of varieties 
that will appeal to you. 
Guarantee 
All plants are guaranteed to be true to name, vigorous 
and healthy when received. If found to be otherwise, we will 
either replace with true stock or refund your money. Mistakes 
are made, but not intentionally. 
Prices include prepayment of postage in the United States 
only. 
A Few Remarks About Iris Rot 
Please Read Carefully 
The development of root rot in bearded Iris is a condition 
that at times all Iris growers have to contend with. Some of 
the causes of this condition are too deep planting of the rhi¬ 
zomes, especially early in the spring, water standing around 
the plants, hot and humid atmosphere, abnormal cold weather 
in winter without any snow protection. 
THE REMEDY: Make raised beds or ridges, so water can¬ 
not stand around the plants, plant very shallow, the top of 
the rhizome should be at the surface of the ground. Next, 
if rot should develop, scrape the soil from around the rhizome, 
clean out the rotted parts, sprinkle with powdered sulphur, 
let the sun shine on the rhizome and you will soon be rid of rot. 
A light covering of straw or coarse hay put on after the ground 
freezes, will help to carry your plants safely through the winter. 
Follow above instructions and you will have little, if any, 
trouble with rot. 
Prize-Winning Irises 
The quality of our plants is unsurpassed. At the Minneapolis 
Iris Show held in Minneapolis, June 2nd and 3rd, 1932, under 
the auspices of the Minnesota Horticultural Society at the 
Northwestern National Bank Building, we made twenty- 
three entries and won twenty-one prizes, fourteen firsts, six 
seconds and one third, besides the Sweepstakes for the most 
prize points scored, and the silver loving cup shown on the 
next page for the most comprehensive display at the show. 
This we did after carrying the flowers 143 miles in an auto¬ 
mobile. When you get plants from Pfeiffer’s you get these prize¬ 
winning strains at no additional cost to you. 
Iris is Ideal for Border Plants 
HOW TO PLANT 
IRIS ROOTS 
Set plants in light, well drained soil where 
Water will not stand. The rhizome or fleshy 
part of the root should be at the ground level. If 
soil is sour, ground limestone is beneficial. 
Use no fertilizer. 
THE PFEIFFER NURSERY 
WINONA, MINN. 
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