. Bulletin of the Department of Agriculture. Agriculture; Agriculture. ,„^ BULLETIN No. 797 i^ J, jyRS-* Contribution from the Bureau of Plant Industry WM. A. TAYLOR, Chief. jrw^°^V«^ Washington, D. C. November 22. 1919 COMMERCIAL DUTCH-BULB CULTURE UNITED STATES. IN THE By David Griffiths, Agriculturist, Office of Horticultural and Pomologlcal Investigations, and H. E. Jtjenemann, Superintendent of the Bellinghatn Plant-Introduction Field Station, Office of Foreign Seed and Plant Intro- duction. CONTENTS. Page. Bulb production, in the United States- 1 Soil adaptation 3 Temperature, soil,
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. ,„^ BULLETIN No. 797 i^ J, jyRS-* Contribution from the Bureau of Plant Industry WM. A. TAYLOR, Chief. jrw^°^V«^ Washington, D. C. November 22. 1919 COMMERCIAL DUTCH-BULB CULTURE UNITED STATES. IN THE By David Griffiths, Agriculturist, Office of Horticultural and Pomologlcal Investigations, and H. E. Jtjenemann, Superintendent of the Bellinghatn Plant-Introduction Field Station, Office of Foreign Seed and Plant Intro- duction. CONTENTS. Page. Bulb production, in the United States- 1 Soil adaptation 3 Temperature, soil, and fertility re- quirements 4 Number of bulbs grown per acre 5 Planting 6 Depth of planting 9 Treatment after flowering 10 Roguing 10 Harvesting the flowers 11 Cultivation 11 Harvesting the bulbs 13 Storing and curing 14 Cleaning 18 Sizing 20 Page. Advantages of sizing 22 Culling 22 Propagation 23 Determination of flowering quality— 26 Packing bulbs 28 Shipping bulbs 28 Balb growing for pleasure 29 Miscellaneous bulbs 33 Bulb pests 33 The best varieties to plant 36 Varieties of narcissi 37 Varieties of tulips 41 Varieties of hyacinths 46 Bulb literature 47 Definitions 47 BULB PRODUCTION IN THE UNITED STATES. The production of bulbs in the United States is in its infancy. In normal times the value of the bulbs used in this country is not far from $2,000,000 a year, while those actually produced here are scarcely worth $25,000 in any one year. This condition exists in spite of the fact that it has been known for generations that narcissus bulbs of perfect quality can be grown over a wide latitude and that tulips, although more exacting in their requirements, can also be produced successfully. Those best in- formed are just as sanguine about the production of hyacinth bulbs, 126953—19—Bull. 797^ 1. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations
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