Should you keep cutting your sweet pea flowers to make them growing?
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Here is a link for you. Such happy flowers!
https://www.gardeningknowhow.com/ornamental/flowers/sweet-pea/care-of-sweet-peas.htm
To encourage bushy growth, pinch off the tops when plants are 6 inches tall—not before or you’ll encourage premature side-shoot development. Also take care to give them at least 6 feet of support to allow them to grow as they love to do.
http://homeguides.sfgate.com/pinch-back-sweet-peas-56792.html