Growing Bulbs

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An introduction to the cultivation of bulbs.

Transcript of Growing Bulbs

  • 1. An Introduction to BulbsAn Introduction to Bulbs Eric StormerEric Stormer Virginia Cooperative ExtensionVirginia Cooperative Extension Norfolk, VirginiaNorfolk, Virginia

2. What is a bulb?What is a bulb? Scalene Bulb (Lilium) Tunicate Bulb (Tulipa) 3. Scalene Bulb (Scalene Bulb (LiliumLilium)) bulbils bulblets 4. Tunicate BulbsTunicate Bulbs 5. Generic Bulbs Generic Bulbs OtherOther GeophytesGeophytes GeoGeo (of the earth) + (of the earth) + phytephyte (a plant living in) = (a plant living in) = GeophyteGeophyte CormsCorms Tubers & Tuberous RootsTubers & Tuberous Roots RhizomesRhizomes Enlarged HypocotylEnlarged Hypocotyl 6. CormCorm Swollen stem baseSwollen stem base modified into a massmodified into a mass of storage tissueof storage tissue Does not possessDoes not possess storage rings whenstorage rings when cut in halfcut in half Crocosmi a 7. Tubers & Tuberous RootsTubers & Tuberous Roots Fleshy modifiedFleshy modified underground stem orunderground stem or rootroot Serves to store foodServes to store food reserves for the plantreserves for the plant Stem tubers bearStem tubers bear buds, eyesbuds, eyes Tuberous rootsTuberous roots develop fromdevelop from adventitious rootsadventitious roots Tuberous roots of Dahlia Caladium tuber, de-eyed 8. RhizomeRhizome Thickened, modifiedThickened, modified stem growingstem growing horizontally,horizontally, underground or justunderground or just along the soil surfacealong the soil surface Iris 9. Enlarged HypocotylEnlarged Hypocotyl Begonia x tuberhybrida Cyclamen persicum 10. Selecting Bulbs -Selecting Bulbs - ConsiderationsConsiderations Size larger plants = larger blossomsSize larger plants = larger blossoms Condition plump, firm, clean & healthyCondition plump, firm, clean & healthy Utilization bedding, naturalizing, forcingUtilization bedding, naturalizing, forcing Longevity treat as annual or perennialLongevity treat as annual or perennial Resistance to deer, squirrels, etc.Resistance to deer, squirrels, etc. HardinessHardiness Seasonality spring, summer, fallSeasonality spring, summer, fall Blossoming Sequential or ConsecutiveBlossoming Sequential or Consecutive Planting Time/Temperature DecemberPlanting Time/Temperature December 11. Where do hardy bulbs come from? 12. Tidewater 13. Soil PreparationSoil Preparation Well drained soil is necessary, especiallyWell drained soil is necessary, especially for long-term survivalfor long-term survival Incorporate compost, peat moss, courseIncorporate compost, peat moss, course sand (to improve drainage) as necessarysand (to improve drainage) as necessary pH should be between 5.5 6.5pH should be between 5.5 6.5 Consider raised beds where soil drainageConsider raised beds where soil drainage is problematicis problematic 14. FertilizationFertilization Incorporate fertilizer in soil at plantingIncorporate fertilizer in soil at planting Consider a prepared bulb fertilizerConsider a prepared bulb fertilizer Consider dried blood (2lb per 100 squareConsider dried blood (2lb per 100 square foot); also discourages squirrelsfoot); also discourages squirrels Fertilize (slow release) in spring afterFertilize (slow release) in spring after leaves emerge, but before plants blossomleaves emerge, but before plants blossom (3 lb. of 5-10-5 per 100 square feet)(3 lb. of 5-10-5 per 100 square feet) 15. Insects & Other PestsInsects & Other Pests Aphids - carbaryl, permethrinAphids - carbaryl, permethrin Spider Mites - insecticidal soap, miticidesSpider Mites - insecticidal soap, miticides Narcissus bulb fly larvae - malathion drench,Narcissus bulb fly larvae - malathion drench, imidacloprid drenchimidacloprid drench Thrips - imidacloprid drenchThrips - imidacloprid drench Squirrels, moles & voles - ultrasonic noise,Squirrels, moles & voles - ultrasonic noise, feeding stations, traps, chicken wire on beds,feeding stations, traps, chicken wire on beds, incorporate sharp gravel in planting holes,incorporate sharp gravel in planting holes, whirling flowers, repellants (capsicum, driedwhirling flowers, repellants (capsicum, dried blood, mothballs, etc.)blood, mothballs, etc.) 16. MaintenanceMaintenance Remove foliage only after it has died backRemove foliage only after it has died back naturally; can be pulled from the soilnaturally; can be pulled from the soil without resistancewithout resistance Mulch to conserve moisture, insulate soilMulch to conserve moisture, insulate soil (minimize temperature fluctuation) and(minimize temperature fluctuation) and discourage weeds but not too much!discourage weeds but not too much! Consider digging and dividing crowdedConsider digging and dividing crowded bulbs (daffodils, crocus) every 5 yearsbulbs (daffodils, crocus) every 5 years 17. NaturalizingNaturalizing 18. BeddingBedding 19. Containerized Bulb PlantingContainerized Bulb Planting 20. ForcingForcing 21. The End Questions?