GREAT CROPS OF STRAWBERRIES AND HOW TO GROW THEM 
Copyright 1915 by R. M. Kellogg Co., Three Rivers. Mich. 
PROGRESSIVE IS A PRIME FAVORITE AMONG THE EVERBEARERS 
PROGRESSIVE is a variety that has done much to encourage favor in everbearing plants. A cross of Senator Dunlap with 
Pan-American, the latter being the earliest of the everbearers, this variety is very clearly marked and is especially notable 
for the immense crops of fruit it yields. It is grown universally; indeed, there are plants of this variety grown in every state 
of the Union. The quality is excellent and all our customers may order these plants with assurance in advance of complete 
satisfaction, both for home use and for the markets where big prices rule. Grown at our Three Rivers and Twin Falls farms. 
as early in the spring as climatic conditions 
permit, and they may continue to fruit until 
checked by winter. 
The experience of our customers with the ever- 
bearing varieties is the same as our own experi- 
ence. They advise us that they have no trouble 
in getting their plants to fruit heavily, and that 
the fall crop sells readily at 30 cents to 50 cents 
per quart without any sorting. 
While we are very enthusiastic over the ever- 
bearing varieties, we certainly do not advise any- 
one to discontinue growing the standard va- 
rieties, but we do advise everyone to set both 
the everbearing and standard varieties, and those 
who will do this and will follow up-to-date 
methods, will have a business that will make 
them independent. 
How to Grow the Everbearing Varieties 
'pHE cultural methods to be followed in growing 
■'• the everbearing varieties are practically the 
same as for the standard varieties. We have 
learned, however, that the everbearing plants 
are very heavy fruiters and require deep, rich 
soil. The more manure incorporated into the soil 
the better will be the results. Manure furnishes 
humus and nitrogen, both of which are very 
important for the everbearers. The past year 
we demonstrated through experiments to our 
entire satisfaction that the everbearing plants 
will fruit earlier and will give a much larger fall 
crop when grown in soil which has been well 
manured than when grown in soil which might 
be considered sufficiently manured for the stand- 
ard varieties. 
The results of our experiments lead us to 
recommend at least twenty tons of stable manure 
for each acre, and we would suggest plowing the 
manure under only about four inches. This will 
make it an easy matter thoroughly to incorporate 
the manure with the surface of the soil — just 
where it should be to give best results. For very 
poor soil, we would recommend in addition to the 
manure 400 pounds of very finely pulverized bone 
meal, and 150 pounds of sulfate of potash. These 
materials should be broadcast over the land after 
it has been ploughed, and thoroughly incorpo- 
rated into the soil. This work should be done a 
week or ten days before setting the plants. If 
the bone meal and potash cannot be secured con- 
veniently, 500 pounds of acid phosphate will take 
the place of bone meal, and a ton of unleached 
wood ashes will supply the required amount of 
potash. The ashes also will supply sufficient lime 
to neutralize any acid that may be present in the 
soil, and also will aid in bringing inert plant food 
into available form. 
We also have learned through these experi- 
ments that the everbearing plants should be 
grown in hills. We find that when the plants 
make runners, the quantity of berries is greatly 
reduced. If you can get the manure and fertil- 
izers which we recommend, you can set the 
plants fifteen by thirty inches, as there will be 
an abundance of plant food to supply the number 
of plants required to set an acre in this manner. 
The season the plants are set blossoms should 
be picked off as fast as they develop, and this 
should be continued until the latter part of June. 
This is a quick and easy task. The runners also 
should be removed as fast as they appear, and 
when grown in hills, this work should be con- 
tinued as long as required by growth of runners. 
When this is done plants will begin fruiting in 
August and continue fniiting until the ground 
freezes. Other cultural methods, such as hoeing, 
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