You can extend the bloom period by planting separate containers with varieties that have various bloom dates (early, mid-, and late season). Typically planted in the spring, these warm-weather bloomers usually don’t survive cold winters if the bulbs are left in the ground. Most will survive but they don't like their roots being very damp and frozen and you may lose them or they can be very slow to new growth in spring My advice would be to plant them outdoors and then if you want them in pots next year plant the up into the pots when the new shoots are 2 - 4 inches tall. They can be grown, but not over-wintered in containers. Space bulbs so they aren't planted on top of one another. It is not a picky perennial but it can be short-lived. Plant tender summer-flowering bulbs, including gladioli, in early spring; Summer Crocosmia look best when planted in the garden in drifts of a dozen or more, though they can also be planted in containers. Most bulbs excel in pots, looking good in any type and style of container. Fertilizer is not necessary. Crocosmia flowers make excellent cut flowers for indoor arrangements. Growing and caring for crocosmias is easy and once planted, you’ll be rewarded by beautiful blooms each year. Plant corms 1.5 inches deep in their plant containers. Plant Crocosmia corms about 8-10 cms (3-4") deep below soil level in a group to form a clump. I want to plant crocosmia bulbs now. Seedlings can be transplanted outdoors in late spring. Planting bulbs in containers means you know exactly where they are, you can move them wherever they need to go to chill, and you can place them on your patio, steps, porch, or wherever they’re going to cause the biggest sensation in spring. Montbretia has ‘escaped’ from gardens and is commonly seen growing on banks by the roadside, often crowding out native species. Plant a handful of corms a few centimetres apart so you start out with a reasonable clump, and cover with soil. When to plant bulbs. Make sure to place bulbs around the large one you put on the bottom, so that your largest bulb’s stem will have room to come up in the spring. Then plant them anew when soil temperatures warm up. Montbretia is a nice perennial that is making a true comeback in our gardens. While many container displays are looking past their best by August, this late-summer display will brighten up a corner of the patio right through autumn. Water bulbs once after planting then regularly when in active growth, but you can reduce watering once the leaves start to die down and then through the dormant season. The corms are hardy and rarely need to be lifted for winter except in areas below USDA Zone 5. Grow crocosmia in moist but well-drained soil in full sun to partial shade. Or amend the soil with the addition of organic material to raise the level 2"-3" to improve the drainage. Plants seeds in seed trays, about 1/4" deep, in seed starting soil. Brighten up your garden with this great deal from Hayloft. Crocosmia, penstemon and rudbeckia pot display. Dig a generous hole, about 7-10cm deep and add a spadeful of well-rotted compost or other organic matter. Corms differ from bulbs by the lack of rings on the interior but otherwise function in a similar manner. Some bulbs, such as tulips and daffodils need a cold period before they can bloom in the spring. Division can be done in early spring, by lifting the clumps and cutting apart sections of the grouped corms. Zones 4 to 7: In colder climates, spring-flowering bulbs can be planted as soon as the ground is cool, evening temperatures average 40° to 50°F, and it is at least 6 to 8 weeks before the ground freezes. The corms are best planted in the fall for blooms the following spring. If timed right, this should be as soon as possible after purchase. They thrive in full sun, but will tolerate light shade. Some gardeners opt for one or two blooms, while others layer bulbs in pots to enjoy a range of different colours blooming at different times throughout the spring. 5. ), peacock orchid (Acidanthera), iris (Iris spp.) Let the rhizomes stick out here and there for the sun to shine on them directly. Now you can either leave the bulbs in pots over winter outside or in a greenhouse as long as the temperature is not too far below freezing but will also not heat up during the day. Make sure you plant your bulbs at least 0.5 in (1.3 cm) from the edge of the pot. And watch for the grassy foliage to emerge a few centimetres apart so you out... Instant colour when i need it by planting bulbs in pots or any. 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