Once income has been verified, use the following to determine qualifying quarters: If the year is: Credit 1 quarter for at least this amount. Credit 2 quarters for at least this amount. Credit 3 quarters for at least this amount. Credit 4 quarters for at least this amount.
Making the world better, one answer at a time. Periwinkles reproduce annually with internal fertilization of egg capsules that are then shed directly into the sea. The female periwinkle lay 10,000 to 100,000 eggs. Periwinkles reproduce annually with internal fertilization of egg capsules that are then shed directly into the sea. The female periwinkle lay 10,000 to 100,000 eggs.
In many instances, extreme vigor may not be desirable unless the periwinkle plant needs to cover a large area. One small plant can spread to 8 feet across. Growing periwinkle as a ground cover is common as it rarely reaches more than 4 inches in height. Periwinkle is best used for controlling erosion as described above.ne small plant can spread to 8 feet across. Growing periwinkle as a ground cover is common as it rarely reaches more than 4 inches in height. Periwinkle is best used for controlling erosion as described above.