Bulbs (Pre-chilled or planted the prior fall)
Early Flowering Shrubs: Rhododendron, Azalea and Lilac (won't grow to full height)
Spring Bloomers: Primrose, Fritillaries, Ferns, Kalanchoe, Pansies
Cool Season Vegetables: Lettuce and Greens ...
You can purchase pre-chilled bulbs or chill them yourself in dry cold storage (40 to 45 °F) for at least 12 weeks using a suitable cold frame, unheated basement, or refrigerator (without vegetables).
In warm climates (Zone 8 and warmer), plant pre-chilled bulbs in late winter or early spring to enjoy in a matter of weeks.
Spring blooming bulbs can be planted from October through December, even into January, if you pre-chill the bulbs. Spring blooming bulbs need twelve to sixteen weeks of cool temperatures (below 50 degrees) for the bulbs to stretch and elongate.
Sow seeds in autumn or spring. Pre-chilling the seeds may aid germination. Self-seeds readily, but unwanted seedlings are easy to remove.
Days to emergence: 21 ...
(Note: flower bulb companies can supply you with pre-chilled bulbs) This chilling is accomplished by keeping the potted bulbs in a dimly lit area at a temperature between a steady 35 and 45 degrees Fahrenheit for a period of 12 to 17 weeks.
Many people don't realize that there are two types of bulbs for indoor growing: those you need to pre-chill and those you don't. Here's how to tell the difference.
Deadheading 101 -- Deadhead spent flower heads on spring-blooming bulbs to direct their energy back to their roots so they can build vigor for next year. However, if the bulbs were pre-chilled, don't bother.
Spring bulbs require 12 to 14 weeks of temperatures below 50 degrees during the winter. If you live in a climate that doesn't have this cold spell, you'll need to pre-chill certain bulbs before planting them.
is similar to the bulb's native environment, you'll have to take extra steps to grow them in your garden. That's why, for example, northern gardeners have to dig up and store tender bulbs during the winter, and southern gardeners have to pre-chill ...
 See also: Plant, Flower, Water, Gardening, Bloom
  
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