You definitely do not want to plant tall bulbs in the front and the low ones in the back, therefore before you start decide where in your garden the bulbs are going to go. If your garden is flat, then it will be a necessity for you to think about building a rock garden based on an outcrop principle where the rocks form layers or terraces.
Remember that where you prune your plant will produce different results. Especially on those gray days in winter it is happy to see the bright cheerful bloom of a flower, reminding that while its gray outside, color and the beauty of the green of nature is close at hand. The growing of plants with chemical fertilizers and building the soil naturally to support healthy plant life is called organic gardening.
Please follow all of the instructions on the back of the packet for the best results. The best thing for drainage is plain, old, infertile sand. People think that putting their plants directly in the sunlight is good for them indoors, but actually it can create a huge temperature range and hurt them when the temps swing wildly from hot during the day and cooler at night.
If you have a large garden you might want to consider irrigating it. It's springtime, and time to get started.