
_ Dwarf Burbank Plum Tree, 3 Yr. Old, in blossom 
successor, Dr. R. G. Hatton, at the East Malling Re- 
search Station, East Malling, Kent, England, perfected 
the clonal rootstocks, by separating the various stocks 
and designated them by numbers, to avoid the mixture 
of two or more stocks. These rootstocks are known in 
this country by their Malling Numbers such as Malling 
Stock No. 1, 2, 4, 7 and 9, which are now chiefly used 
for dwarfing apples. There are still other Mallings, but 
after years of experimentation, the above selected 
strains have proven most satisfactory. 
As a given rootstock controls different varieties in 
different degrees—soil and other environmental condi- 
tions often control the growth and fruiting more than 
the rootstock. Malling IX for instance, does not dwarf 
all varieties to the same extent. 
Many fruit varieties perform differently on various 
clonal rootstocks. 
Malling No. IX is the dwarfest stock. It is well- 
suited for the home garden where ground space is 
limited. The ultimate size of this tree is 5 to 8 feet, 
depending again upon the variety grafted. 
Malling No. I, Il, IV, and VII are Semi-Dwarfing 
stock. These have proven valuable and favored for the 
commercial orchards or home gardens. 
Other varieties of fruit are grafted onto their proper 
rootstocks also, thus making them dwarf in habit. | 
Peats are propagated exclusively on Anger Quince 
which dwarfs most successfully. Peaches and Nectarines 
on Almond; Plums and Apricots on St. Julien Plum; etc. 
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