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They are numerically about 6 lower than the USDA system. For example, Australian zone 3 is roughly equivalent to USDA zone 9. The higher Australian zone numbers had no US equivalents prior to the 2012 addition by USDA of zones 12 and 13. The spread of weather stations may be insufficient and too many places with different climates are lumped ...
[citation needed] Some bulbs – such as tulips – need cold winters to bloom, while others – such as freesia – can survive a freezing winter. [citation needed] Many domestic plants are assigned a hardiness zone that specifies the climates in which they can survive. Winter gardens are dependent upon the cultivation of winter-hardy plants.
About 90% of the root mass is in the upper 20–30 cm (8–12 in) of soil; some lateral roots can penetrate up to 2 m (6 + 1 ⁄ 2 ft) deep. [6] The inflorescence is an unbranched and indeterminate terminal raceme measuring 50–100 cm (20–40 in) tall, [6] with flowers that are yellow or white.
Brassicaceae (/ ˌ b r æ s ɪ ˈ k eɪ s iː ˌ iː,-s i ˌ aɪ /) or (the older) Cruciferae (/ k r uː ˈ s ɪ f ər i /) [2] is a medium-sized and economically important family of flowering plants commonly known as the mustards, the crucifers, or the cabbage family. Most are herbaceous plants, while some are shrubs.
Root, tuber and bulb crops — like carrots, beets, radishes, potatoes and onions — need more water once crops have “set” in the soil, but they still need to grow a thickness to them.
Brassica oleracea is a plant of the family Brassicaceae, also known as wild cabbage in its uncultivated form. The species evidently originated from feral populations of related plants in the Eastern Mediterranean , where it was most likely first cultivated.
Red cabbage prefers climates that remain moist and cool for most of its vegetative growth stage, so it can be placed in the ground shortly after the last frost while the spring is still cool. The cabbage plants can be spaced about 30–65 cm (12–26 in) from one another. They will need watering often but are otherwise low-maintenance plants. [8]
The seeds should be deposited 1 to 2 cm (0.39 to 0.79 in) deep, with a row width of 40 to 45 cm (16 to 18 in) and 25 to 30 cm (9.8 to 11.8 in) distance between the seeds. [ citation needed ] The seedlings can be grown in the greenhouse and then transplanted into the field after two to three weeks.