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AVERAGE Annuel 
LOWEST Temperature for Each Zone 
ZONE | - N & Cent. Canada ZONE 6 - — Sto. 5 
ZONE 2 - —5S0 to —35 ZONE 7 - : Sto + 10 
ZONE 3 - —35 to --20 ZONE 8 - 410 to +20 
ZONE 4 20 to —10 ZONE 9 - +20 to +30 
ZONE 5 - —10to - 5 ZONE 10 - +30 to +40 
ZONES are an APPROXIMATE basis for choosing 
the kinds of plants which can survive AVERAGE 
winters. People who use EXTRA CARE, who pro- 
tect plants with mulches, wind screens, etc., may 
succeed with a plant in places one or even two 
zones colder than is NORMAL for that plant. Peo- 
“ple“who give’ special Care may lose a plant, 
even in a normal zone, when the first “hard win- 
ter’’ arrives. 
This is the ONLY study of WINTER HARDINESS of the 15 living species of ‘Redwood Trees” 
"FERN-LIKE" FOLIAGE (except T. ascendens) 
1. TAXODIUM--3 species, 6 or more varieties 
T. distichum--Baldcypress. NOT a cypress, 
but the FIRST Redwood, gave the family its 
scientific name. Deciduous--to 160 ft. -- 750 
years. Dixie. ZONE 3 to 10 
T. ascendens--Pondcypress. ''Little sister" 
of Baldcypress--deciduous--to 50 ft. -- 100 
years or more. Next to smallest Redwood 
Dixie--seldom planted. ZONE 3 to 10. 
T. mucronatum--Montezuma cypress. NOT 
a cypress, probably longest life of the family 
To 170 ft.--45 ft. diam. trunk. Evergreen 
in tropics, deciduous north. ZONE 9 and 10. 
chcde Ww Cabal fonsite = bY tala 5? pias — WHITE Woop 
2. METASEQUOIA-ancient "fossil" lately found 
still living in western China. Deciduous. 
M. glyptosroboides--Dawn Redwood, 1 spe - 
cies. To 160 ft., 1000 years. ZONE 3 to 10. 
3. GLYPTOSTROBUS-Chinese Swamp Redwood 
G. heterophyllus--1 species--midget--to 35 
ft.--very thick evergreen foliage. ''Little 
sister'"' of Dawn Te wead 9 
and10. WHYTE Wea 
4. SEQUOIA -- 1 species, MANY varieties. 
S. sempervirens--California Coast Redwood 
World's tallest--to 365 ft.--2000 years. Ev- 
ergreen--BEST lumber. ZONE 8 to 10 
3 
S Midget Redwoods—Hybrid Redwood 
When present scientific studies are. completed, 
it will be possible tolist the Midget and Hybrid 
Redwoods by scientific names. Until then, our 
best guess is—the Midgets will be classed as a 
new SPECIES—the Hybrids will be called VA- 
RIETIES of the Coast Redwood. Now we have 
five Midgets. It appears that we will have 25 
to 50 types of Hybrids. 
6-10 
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COPYRIGHT—1951 ot, 
by W. Warren Anderson 
which Zone applies to YOUR location. 
your own records of LOWEST 
WINTER TEMPERATURES, to determine 
FOREIGN LANDS: Consult 
REMEMBER—ALL PLANTS when young, are more 
tender to freezing by two or three zones. The “‘in- 
fancy period’’ of all plants varies from a few 
weeks for annuals to 10 or even 20 years for a 
tree that lives several thousand years. 
The LOWEST winter temperatures each year for 
40 years—recorded by the U.S. Weather Bureau— 
were averaged to outline these zones. This study 
covered 1895 to 1935. 
ase 
The Redwood Family (Taxodiaceae) 
15 Living Species— (many extinct species) —for a variety of climates 
"SCALEL-LIKE'" FOLIAGE (inc. I, ascendens) 
5. SEQUOIADENDRON--1 species, 3 varieties 
S. giganteum (Sequoia gigantea)-Sierra Red - 
wood, Giant Sequoia, To 300 ft.--35 ft.diam - 
eter--4000 years--evergreen. ZONE 5 to 10 
6. TAIWANIA--1 sp., Formosa and west China 
T. cryptomeriodes--Tiawania. Third tallest 
Redwood--to 200 ft.--evergreen--cone to 1/2 
in. --like Giant Sequoia ZONE 9 and 10. 
7. CRYPTOMERIA--1 species -- 12 varieties 
C. japonica--Cryptomeria, Japanese Cedar 
Evergreen--to 125 ft.--many DWARF vari- 
eties. Like Giant S as Cones 1/2 inch. 
ZONE 5to 10. Wf fe} ‘eo? 
8. ATHROTAXIS--3 sp., evergreen, Tasmania 
A, cupressoides--Pencil Pine. Wood used 
for pencils. To 40 ft.--foliage scales tiny, 
hug twigs. Cones to 1 in. ZONE 8 to 10. 
A. selaginoides--King William Pine. To 100 
ft.--evergreen--cone and lumber very like 
the California Coast Redwood! ZONE 9 & 10 
A. laxifolia--Hybrid Pine. Natural HYBRID “A % 
of the two above. Evergreen--to 40 ft.--fol - Me & 
iage tiny 14 in. scales. ZONE 8 to 10. . & 
"ENLARGED-SCALE" FOLIAGE 2s 3 
9. CUNNINGHAMIA -- 2 species. ee, 
C. sinenis (lanceolata)--China Fir. Lumber Pd 
tree of China--to 80 ft. Exotic, bushy. Cones Ps 
pine-like, leaves spiny-pointed. ZONE 8 to 10 
C. Konishii--Formosa Fir. Evergreen--100*%, 
ft. Bark red-brown, silver-white with age. 
Foliage spiny-pointed--cone 1 in. ZONE 9 
and 10. 
10. SCIADOPIT YS--1 sp., 2 vars.,--evergreen 
S. verticellata--Japanese Umbrella Pine. 
NOT a pine. To 120 ft.--6 in. coarse need- 
les in whorl like umbrella ribs.ZONE 5 to10 
