To Prune or Not?

To Prune or Not?

I planted some Blue Prince and Blue Princess holly bushes last fall to create a hedge along one property line. My question is: should I prune them now or wait? I'm in Zone 5. My intent is to cut back the top growth to encourage better 'filling in.' Any suggestions/tips would be greatly appreciated!
Thank You for all the ideas for flower garden

Thank You for all the ideas for flower garden

It’s cold and rainy but. . .

It’s cold and rainy but. . .

Wisteria nearly out!

Wisteria nearly out!

Can I have an ID please?

Can I have an ID please?

Fuchia Success!

Fuchia Success!

Whazzat?

Whazzat?