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UNITED STATES DEPARTMENT OF AGRICULTURE 
DEPARTMENT BULLETIN No. 1270 
Washington, D. C. 
October 11, 1924 
THE PRODUCTION OF NARCISSUS BULBS 
By 
DAVID GRIFFITHS 
Horticulturist, Office of Horticultural Investigations 
Bureau of Plant Industry 
CONTENTS 
Page 
Explanation of Terms 1 
Securing Stocksf or Planting 2 
How Bedding and Forced Bulbs Should be Hand ed . . . 4 
Preparation of the Bulbs for Planting 5 
Preparation of the Soil S 
Planting 5 
Time of Planting 6 
Autumn Treatment of the Beds 6 
Cultivation 7 
Mulching 7 
Spring Work on the Beds 7 
Second Tear of the Biennial Crop g 
Roguing g 
Disposition of the Rogues 8 
Digging 
Daffoditand Tulip Digging Compared 
Removing Loose Soilfrom the Bulbs . 
Storage 
Curing 
Changesi o the Bulbs as Tbey Dry . . 
Page 
Breaking the Bulbs Apart 12 
Sizers and Sizing 13 
Drainage and Soil Percolation 14 
Dse of Lime IS 
Fertilizers in Commercial Culture 15 
Daffodils a Biennial Crop 16 
Culture for Cut Flowers . 16 
Harvesting Flowers 17 
Removing the Faded Flowers 17 
Appearance of the Flower Spike 17 
Difference in Cost of Varieties 18 
Specialltems 18 
Enemies 23 
Where Narcissus Bulbs Are Grown 24 
Relative Use of Varieties 25 
Breeding Daffodils 25 
Naturalizing Varieties 26 
Yields 26 
Conditions of Daffodil Culture . . '. 28 
Narcissus Varieties and Their Classification 29 
Recommendations - . . . 30 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1924 
