One can pick periwinkle flowers anywhere they are grown and are allowed to pick them. Many gardeners grow periwinkle flowers and you can also find them in the wild.
By explosion
Yes.
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Periwinkle is native to North America, Europe, China and India. It is a semi woody evergreen perennial, and is known by three names: Vinca, Periwinkle (or Madagascar periwinkle), and Myrtle.
Flowers can be either male, female or both. I'm not sure if the periwinkle is any specific 'gender'. I'd say the either or both applies for all flowers.
Yes, they will grow for many years. If they become sparse, cut them back.
... common shells found in the ocean or rivers. There are also flowers called "periwinkle" one species is European, another from Madagascar.
A wet nice area for them to maintain all there water
how to pick flowers
The periwinkle plant contains substances that are effective against leukemia. In fact, Vinblastine and vincristine are alkaloids found in perwinkle that are approved by the FDA and are used to make chemotherapy drugs. To read more about medical aspets of periwinkle plants, visit the Related Link.
to see how they wiegh
so that it can grow properly