[fl jl GREAT CROPS^STRAWBERRIES^nOW TO GROW THEM|J ^ 
Free Personal Service 
Kellogg's Free Service Department is maintained solely for the purpose of encouraging 
and assisting our customers in their strawberry work. We realize that our customers may 
experience new and special problems from time to time and while 'The Key to Strawberry 
Profits' gives complete instructions and answers practically every question in regard to 
strawberry growing, should you require any additional information, a short communication 
addressed to our Free Service Department will bring you the desired information promptly. 
To enable us to render you the most efficient service, kindly observe the following simple 
requests when asking for information: 
1. Before writing our Free Service Department, read carefully 'The Key to Straw" 
berry Profits' as undoubtedly it contains the desired information. 
2. Please make your letter and questions brief and to the point. Do not include your 
questions in your letter but write them on a separate sheet and only on one side of the paper. 
3. Number questions consecutively so we may answer them in the same order. 
4. Write your name and address on your letter also on the sheet containing questions. 
5. In describing your soil, simply state whether heavy, light or loamy. Do not send 
soil samples as these are of no practical value to us in judging the quality of your soil or mak- 
ing up a selection of varieties. 
6. Description of your climatic conditions is not necessary as we are acquainted with 
these general conditions in all sections. 
7. Always use the same signature. Every season we receive letters that are unsigned 
or the address not given. The writers no doubt wonder why they do not receive a reply. 
8. If you have occasion to write us during absence from home, always refer to your 
home address so that we may locate former correspondence and reply promptly. 
9. Please write plainly. 
To Assist You 
in making out your order, we offer the following suggestions: 
Any soil which will grow garden vegetables or farm crops also will grow Kellogg Straw- 
berries successfully. We recommend either the hill or single-hedge row systems. For the 
hill system, rows are made 30 inches apart and plants set 15 inches apart in the row, requiring 
100 plants per square rod, or 14,000 per acre. For the hedge-row system, rows are made 3 ft. 
apart and plants set 2 ft. apart in the row, requiring 50 plants per square rod, or 7,000 per acre. 
Varieties indicated (P) are female or pistillate and require mating, which means that 
bisexuals indicated (B) must be set with them. Pistillate varieties may be mated by setting 
alternate rows of bisexual and pistillate or by following each row of bisexual with two rows 
of pistillate. Bisexual varieties do not require mating as they will fruit independently of 
pistillates. 
If you are not acquainted with varieties, tell us the number of plants you wish to set, 
the dimensions of the ground you intend to plant to strawberries, or send us the amount you 
wish to invest in plants and our Free Service Department will submit for your approval a 
selection giving number of plants and varieties best adapted to your particular requirements. 
We advise having plants shipped early in the season. Should conditions make it im- 
possible for you to set the plants upon or soon after receiving them, they may be 'heeled in' 
until they can be planted. This is fully explained in 'The Key to Strawberry Profits.' 
Varieties for 1921 
The varieties listed in this book are the only ones we are growing this season, the ex- 
tremely unfavorable weather conditions which prevailed during planting time last spring mak- 
ing it absolutely impossible for us to set all the varieties which were listed in our 1920 catalog. 
Peerless, Progressive, Superb and Perfection are the only everbearing varieties we are 
growing this year. All others listed in this book are standard varieties. The everbearing 
varieties may be permitted to fruit the same season plants are set, but standard varieties 
should not be allowed to fruit until the following year. 
Do not confuse the standard and everbearing varieties when making out your order. 
The extent to which Kellogg's Free Service Department can assist you in solving your straw- 
berry problems is limited only by the number of strawberry problems you have to solve. 
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