Rooting for Spring

BULBS, CORMS, RHIZOMES, AND TUBERS

1
Bulbs are underground stems with soft, scaly layers surrounding a central bud. The scales store food and are attached to a basal plate (the bottom of the bulb where the roots come out). The central bud is the future flower.
2
Corms are swollen underground stems that store food for the plant during dormancy. Unlike bulbs- corms are solid and do not have scales or flesh-like leaves. Since they are solid, the bud, or growing tip, is on the top of the corm, instead of in the centre of the bulb’s scales.
3
Rhizomes are fast-growing underground stems that grow horizontally. Many plants that we consider invasive grow by rhizomes, though many are manageable.
4
Tubers are a type of swollen stem with a leathery exterior. Tubers have eyes, or growth nodes, from which the new plants grow. To propagate plants, all you need to do is lift the plant and cut off healthy pieces of tuber, each with about three eyes on it.

STORAGE

GLADIOLUS CORMS

Allow leaves to wither naturally for 6 to 8 weeks after blooming before digging. Remove tops close to the corm. Leave to dry for one day.  Store newly formed corm and cormlets in open boxes of peat in a cool space for winter.

DAHLIA TUBERS

After first killing frosts, dig up tubers.Remove extra soil and broken roots, and stand upside down for one week to dry. Store in a dry,cool area in peat moss.

CALLA LILIES

Tubers can be dug when all the leaves have yellowed and dried in September. If in pots,gradually decrease watering as leaves yellow and die. Lay pot on side in a cool place, allowing it to dry fully.

FREESIA

When blooming period is over, continue to fertilize and water to build storage for next year.As foliage yellows, gradually reduce watering.Store dry corms in a cool, dry basement. Dust with bulb fungicide/miticide.

RANUNCULUS

Before heavy frost after foliage has died naturally, dig up corms. Store in a dry, cool location until spring.

ANEMONES DE CAENAND ST. BRIGIDS

Before heavy frost, dig up corms. Dry in well-aerated place. Store in dry, cool location.

GLADIOLUS

Superb as cut flowers and effective in the border, gladiolus blooms start to open from the bottom of the spike upwards. A full two weeks of continuous colour can be obtained from one plant alone.  Planting can begin as soon as tree leaves unfold in the garden. Continuous bloom can be achieved from mid-summer until fall by making several plantings at two week intervals up to mid-June, or by planting a choice of cultivars that bloom very early to very late.  Very early 65 to 70 days from planting.

Early – 70 to 75 day
Early Medium – 75 to 80 days
Medium – 80 to 85 days
Late Medium – 85 to 90 days
Late – 90 to 100 days
Very Late- 100 to 105 days

CANNA LILY

Dig up rhrizome with some soil after tops are killed outdoors by the frost. Clean the rhizomes and store in barely moist peat moss in a cool location.

BEGONIA TUBERS

Lift plants in late October; allow foliage to die-down, then remove stems. Store tubers in dry peat moss in a cool basement.

IRIS

Dig up to divide and replant in compost-rich soil every three to five years for better blooms.

CALADIUMS

Require four months of good growing conditions to store food in the tuber for next year’s growth. In fall, dry out plants and store ina warm area until spring.

LILIES

Leave undisturbed as long as blooming is satisfactory. Spent blooms should be removed and flower stem gradually cut back. Keep fertilizing to ensure good bulb formation for next year. Replant if blooming becomes poor.  Remove and plant bulb lets (small bulbs) in rich, well-drained soil. Some species will spread naturally.

ACIDANTHERA AND MONTBRETIA

In fall, lift plants before heavy frost. Let dry in open air. Store plants in boxes or flats in a dry, cool place until April.

Name & Type Height (cm) Planting Depth Comments
Amemones (Corm) 12.5-20 5 Soak tubers overnight before planting. Old leaf scarsmark the top. Very colourful.
Begonias (Tuber) 30-45 5-7.5 Available in many colours. Use in shady spots andhanging baskets. Plant cupped side up.
Caladiums (Tuber) 30-60 5-7.5 Beautiful foliage for shady areas. Old stem scars markthe top. Too much nitrogen causes loss of colour,
Calla Lilies 60-90 5-7.5 Elegant white flower on 15 cm spike.
Cannas (Rhizome) 45-120 7.5-10 Large and dwarf varieties. Many of these naturalizewell and come back as perennials.
Dahlias (Tuber) 30-90 5-7.5 Many different colours and flower types. Handletubers with care. Dig after killing frost and store.
Elephant Ears (Tuber) 90-180 12.5-15 Huge green leaves give a tropical look. Biggerbulbs make bigger plants and leaves.
Gladiolus (Corm) 120-180 7.5-10 Flowering spikes in many colours. May need stakingor wind protection. Dig 6 to 8 weeks after flowering.
Lilies (Bulb) 75-135 10-12.5 Perennial favourites in a broad range of colours.
Ranunculus 12.5-17.5 5-7.5 Beautiful assortment of colours. Plant with fingerspointing down.
March 08, 2021 — Ryerse Garden Gallery