First, cut a circular opening right on top of the pumpkin. The opening must be large enough so that you can easily insert the six inch plastic or terracotta flower pot inside of it. You can waste the cap and stem of your pumpkin.
Next, you have to remove the seeds and loose pulp from the pumpkin. Discard the pulp and seeds and clean the pumpkin from the inside. It is extremely important for you to clean the pumpkin carefully, otherwise it may get punctured. Then fill the pumpkin with 3 inches layer of sand.
Now, put the pot of mums into the pumpkin from its opening. Then, place the festive napkin or any other piece of fabric swatch with the help of a plate or tray which is larger than the whole circumference of your pumpkin.
You can improve the appearance of the pumpkin by inserting a variety of foliage around its base and on the table which it is placed. You can use oak, nuts, cattails, thistles, wheat shoots, eucalyptus stems, acorns, simple twigs, cinnamon sticks, bits of moss, gourds, fern fronds, maple or magnolia leaves (real or artificial), seed pods, baby’s breath and Indian corn.
If you will keep the centrepiece clean and properly watered, you can enjoy it for weeks. After sometime, it will become soft from the bottom. At that time, just remove your mums and plant them in a larger pot.