Instead of purchasing a ready-made arrangement that lacks personalization or character, take a bit of extra time and make a simple Valentine's Day flower arrangement with flowers you grew in your own garden. The process is simple and will be considerably less expensive than purchasing a ready-made arrangement. Choose a lovely vase to complement the flowers and your sweetheart will have a lasting keepsake.
Fill the glass vase approximately three-quarters full of warm water and add the floral preservative. Stir to incorporate the preservative into the water.
Construct a grid over the top of the vase with the waterproof floral tape. Attach pieces of tape across the opening in horizontal and vertical strips to create a grid. Make the grid squares about ¼ inch. Secure the entire grid with another piece of floral tape around the rim of the vase.
Trim the bottom leaves from the leaf ferns so that no leaves will be beneath the water surface. Insert the leaf ferns at various places through the grid in the opening of the vase.
Hold the roses under cool water and cut 1 inch from the bottom of the stems. Make these cuts at a 45-degree angle. Insert the roses into the vase, placing the tallest roses in the center and the shorter roses around the outside of the vase.
Insert the filler flowers between the leaf ferns and the roses. Fill in all the gaps, spacing the different flowers evenly throughout the arrangement.
Look at the arrangement from a few steps away for a different perspective. Make any changes to the placement of the flowers to make it look exactly as you wish.