Although flower bulbs, in principle, don't need fertilizer, an organic fertilizer, such as well-composted cow manure, is advisable when creating perennial plantings. Mix the fertilizer thoroughly with the soil before planting. A slow acting fertilizer is preferable, supplemented with some nitrogen immediately after the plants emerge. It is also a good idea to plant the bulbs in interchangeable inner containers so that the outer container can be utilized for other plantings all year round. Ideas For window boxes or containers on patios and balconies, bulbs producing short-stemmed flowers should be chosen because of the wind.
Combinations using only flower bulbs are very effective.
Moreover, a container planted with an inner container holding narcissi, grape hyacinths, crocuses and botanical tulips or Chionodoxa, garden tulips and Scilla, all flowering at different periods, provides a long flowering period. Flower bulbs are also perfect for combining with other plants in containers. Puschkinia, Scilla or Anemone blanda produce a splendid display when placed at the base of evergreen shrubs or conifers. Species narcissus or botanical tulips can be combined beautifully with low growing Cotoneaster, Hedera and other similar plants. You'll get a beautiful effect if you combine flower bulbs with heather, rockery plants and bedding plants.