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The bulbs need some exposure to cold temperatures for 12 to 14 weeks in order to bloom. [1] Flower bulbs are generally planted in the fall in colder climates. The bulbs go dormant in the winter but they continue to absorb water and nutrients from the soil and they develop roots. [2] Most bulbs produce perennial flowers.
The bulbs are produced to satisfy the demand for bulbs for parks, gardens and as house plants, in addition to providing the bulbs necessary for the production of cut flowers. The international trade in cut flowers has a worldwide value of approximately 11,000 million Euros, which gives an idea of the economic importance of this activity.
The start of dormancy can be seen in perennial plants through withering flowers, loss of leaves on trees, and halting of reproduction in both flowering and budding plants. [19] Perennial species may produce relatively large seeds that have the advantage of generating larger seedlings that can better compete with other plants. Perennials also ...
Salvia is a hardy perennial that has spikes of purple, pink or white flowers atop mounded foliage. These summer bloomers, which attract pollinators, are sturdy and trouble-free, so they’re a ...
Cranesbill, also known as perennial geranium, are amazing ground cover perennials. With attractive crane’s bill-shaped flowers that float above pretty foliage, they spread rapidly in good ...
Narcissus is a genus of perennial herbaceous bulbiferous geophytes, which die back after flowering to an underground storage bulb.They regrow in the following year from brown-skinned ovoid bulbs with pronounced necks, and reach heights of 5–80 centimetres (2.0–31.5 in) depending on the species.
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