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“Tulips also should be pre-chilled in zone 7, in case of a mild winter.” Place your bulbs in the fridge at a consistent temperature (between 35 and 48 degrees F) for no less than 10 weeks and ...
Because they need cold, tulips do best in USDA Hardiness zones 3 to 7 (find your zone here). If you live in a warmer region, you need to buy pre-chilled and pre-potted tulips in order to enjoy ...
Tulip bulbs are typically planted around late summer and fall, in well-drained soils. Tulips should be planted 10 to 15 cm (4 to 6 inches) apart from each other. The recommended hole depth is 10 to 20 cm (4 to 8 inches) deep and is measured from the top of the bulb to the surface. Therefore, larger tulip bulbs would require deeper holes.
[7] It is hardy down to -30 °F. [11] In America, this equates to USDA Zones 4 through 8. [9] A hot dry summer and cold winter is essential for the plant to re-flower again, so in warmer climates it is recommended that the bulbs should be dug up and chilled for 3 – 4 months and then planted out in mid winter or spring. [7]
It is suitable for growing in USDA Growing Zones: 3 to 8, in full sun and soils with medium moisture retention or well-drained soils. [10] Seed germination of the tulip has been studied, and it was concluded that stratification for 7 weeks was more effective treatment on studied traits than 5 weeks. Moreover, cold stratification was a better ...