Roots will form in the autumn. Foliage will develop in the spring and flowers will follow in late summer through fall. Watch our video advice on how to layer bulbs in a pot. Buds and flowers are produced in the early spring. When you plant bulbs in pots, you protect them from squirrels and moles. The pointy tops of the bulbs … When planting, ensure that the bulbs don’t touch. In the spring, as they start to bloom, you can then sink the pots into larger display containers. Crocuses do best in full sun, but since they bloom so early in the year, there will be few leaves on the trees when they bloom, so spots that are shady in summer are fine for spring-blooming crocus. Bulbs are ideal for anyone who rates themselves as 'keen-but-clueless' because they are one of the easiest plants to grow. Grow bulbs in plastic pots that are the same size as your decorative outer containers. On the flip side, warm, damp conditions can encourage fungus and disease problems in early-planted bulbs. The bulbs are small and rounded, with slight pointed tops - plant with the points facing upwards. Many gardeners who grow crocus plant corms (bulbs) once, and then allow this flower to grow naturally in wild areas of their lawns. Some fertilize at planting time with bone meal. If channels or holes develop in the potting mix, fill them with moistened potting mix.You can plant various bulbs in a single container, but be sure to select varieties that are timed to blossom simultaneously (for example, don't pair late-season daffodils with early crocuses). Plant the flower bulbs you will be forcing half to three-quarters of the way deep into the pot. Do … Roots will form in the autumn. The best bulbs for containers. When To Plant Crocus Bulbs (Corms) Spring-blooming Crocus are hardy in zones 3-8 and are planted in fall, as long as you can still work the ground. Dig holes and plant the crocus bulbs 3-4" deep and 2-3" apart. Each bulb will multiply quickly into several bulbs. Whether in the ground or in pots, tulips should be planted after the weather turns cold. Bulbs in pots If you want a great patio display, try growing bulbs in pots.