Giving flower buds as a floral gift is less common than flower arrangements and bouquets. The significance of flower buds is their symbolism of natural fresh beauty and is commonly given amongst the youth. The benefit of flower buds as a gift is that lasts longer and the receiver has the opportunity to see how the flower blooms.
You have all the time to rearrange or polish your flower arrangement. The flower design should look beautiful and artistic enough before you place your filler, when the filler is already placed, it would be harder to move your things around the area or place. Bear in mind that The filler are very fragile.