Bulbs and tuberous plants – tulips, daffodils, gladiolus

Bulbs and tuber plants – tulips, daffodils, gladiolus

Bulbs and tuber plants represent one of the most effective groups of garden flowers. The principle is elegantly simple: plant a bulb or tuber, give it time, and nature does the rest of the work. From snowdrops pushing through snow in February through fragrant hyacinths in April to majestic gladiolus in August – a properly assembled collection of bulbs ensures continuous blooms throughout the entire growing season with minimal daily care.

Browse our selection of bulbs and bulbs and tuber plants.

Spring bulbs – planted in autumn

Spring bulbs are planted in autumn (September–November) and bloom from February to June. The cold winter period is essential for them – without stratification, they won't develop a quality root system or flower buds.

Tulips (Tulipa)

The most diverse of all spring bulbs with thousands of registered varieties. The shape range extends from simple chalice forms through double and fringed to parrot and lily types, with the color palette covering practically the entire spectrum.

• Planting: October–November (later planting reduces tulip fire risk)
• Depth: 15–20 cm (approximately 3× bulb height)
• Spacing: 10–15 cm
• Location: Sun or partial shade, well-draining soil without standing water
• Blooming: April–May
• Tip: For a natural, unstructured look, plant in irregular groups of 10–25 bulbs. Botanical species (T. tarda, T. turkestanica) naturalize in beds and reliably return each spring without replanting.

Daffodils (Narcissus)

Trumpet flowers in golden yellow, cream, and white are symbols of spring awakening. Daffodils have one practical advantage over tulips: they contain a poisonous alkaloid (lycorine), so rodents and deer won't eat them.

• Planting: September–October (the earlier, the better – they need longer rooting time than tulips)
• Depth: 15–20 cm
• Spacing: 10–15 cm
• Location: Sun or partial shade, ordinary garden soil
• Blooming: March–May
• Tip: After flowering, let foliage naturally yellow and dry for 6–8 weeks. During this period, the bulb stores nutrients for next season – premature cutting or tying leaves significantly weakens next year's blooming.

Crocuses (Crocus)

Inconspicuous but extraordinarily hardy. They bloom among the first – often flowering directly through snow in February, and their purple, yellow, or white cups are a welcome signal of winter's end. They're ideal for lawn naturalization.

• Planting: September–October
• Depth: 8–10 cm
• Spacing: 5–8 cm
• Location: Sun or partial shade
• Blooming: February–March
• Tip: Crocuses shine in mass planting – plant hundreds at once. In lawns they gradually spread, but don't mow grass before crocus foliage completely yellows.

Hyacinths (Hyacinthus)

Compact racemose flowers with intoxicating fragrance that pervades the entire garden. They bloom in blue, purple, pink, white, and yellow, and are popular for forcing indoors as well.

• Planting: September–October
• Depth: 12–15 cm
• Spacing: 10–15 cm
• Location: Sun or partial shade
• Blooming: April
• Tip: The largest and most beautiful flower spikes appear in the first year after planting. In subsequent years, flower production weakens – support it with potassium fertilizer immediately after flowering.

Snowdrops (Galanthus)

The earliest spring bulbs of all – first shoots often push through snow cover as early as January. They form loose clumps that expand over years into extensive colonies, lending the garden a romantic, natural character.

• Planting: Best "in the green" – freshly after flowering with foliage retained (April–May). Dry bulbs from bags planted in autumn have substantially lower establishment success.
• Depth: 10 cm
• Spacing: 5–8 cm
• Location: Partial shade, ideally under deciduous trees (they receive light in winter and early spring before trees leaf out)
• Blooming: January–March

Grape hyacinth (Muscari)

Tiny blue-violet "clusters" are excellent companion plants – they excel especially combined with tulips or daffodils, where they create color and height contrast. They're unpretentious and very vigorous, eventually spreading readily by seed.

• Planting: September–October
• Depth: 8–10 cm
• Spacing: 5–8 cm
• Location: Sun or partial shade
• Blooming: April–May

Summer bulbs and tubers – planted in spring

Summer bulbs and tubers are planted only after the last frosts – in Czech conditions, typically from mid-May onward. They bloom from summer to autumn and unlike spring bulbs are not frost-hardy: every autumn they must be dug up, properly dried, and overwintered in frost-free conditions.

Gladiolus (Gladiolus)

Vigorous spikes densely covered with flowers in all available colors are classics of summer beds and vases. For extended bloom, plant successively every two weeks from April to June – first planting flowers in July, the last in September.

• Planting: April–June (in stages)
• Depth: 10–15 cm
• Spacing: 10–15 cm
• Location: Full sun, nutrient-rich and well-draining soil
• Blooming: July–September (depending on planting time)
• Overwintering: Dig after first frosts, dry for 2 weeks, store at 5–10 °C
• Tip: Taller varieties are prone to lodging – stake with bamboo poles or metal supports as early as possible once they reach one-third of final height.

Dahlias (Dahlia)

The uncrowned queen of autumn borders. The diversity of forms has no equal in gardening – from simple through decorative, cactus, pompom, and ball types to dinner-plate varieties with flowers as large as plates. Available in all colors except blue.

• Planting: May (after last frosts)
• Depth: 10–15 cm (place tubers horizontally)
• Spacing: 30–60 cm (depends on variety height)
• Location: Full sun, nutrient-rich and adequately moist soil
• Blooming: July–October
• Overwintering: Dig after first frosts, dry, overwinter in peat at 5–8 °C
• Tip: Regular deadheading extends bloom time. For large-flowered varieties, remove lateral buds and allow only terminal flowers – you'll get significantly larger and more representative blooms.

Lilies (Lilium)

Elegant, upright-growing bulbs with trumpet or reflexed flowers, many intensely fragrant. Asiatic hybrids are among the most hardy and easiest to grow; oriental hybrids are the most fragrant. Most lilies in Czech conditions overwinter directly in the bed.

• Planting: October–November or March–April
• Depth: 15–20 cm (approximately 3× bulb height)
• Spacing: 15–20 cm
• Location: Sunny location with cooler soil at roots – mulch or plant low underplanting
• Blooming: June–August
• Tip: Lilies lack the protective papery covering of tulips. Bulbs dry quickly – plant them as soon as possible after purchase, ideally within 48 hours.

Tuberous begonias (Begonia x tuberhybrida)

Large-flowered, full-petaled begonias with vivid colors are ideal for partial shade and shaded spots where other summer bulbs won't thrive. They excel in containers, hanging baskets, and window boxes.

• Planting: Pre-growing from March indoors or in a greenhouse, outdoor planting after frosts
• Depth: Superficial (tuber placed with concave side up, just below substrate surface)
• Location: Partial shade or shade
• Blooming: June–October
• Overwintering: Dig, dry, overwinter dry at 5–10 °C

Canna (Canna)

Vigorous plant of tropical appearance with broad ornamental foliage (bronzed or striped in some varieties) and vibrant flowers in red, orange, or yellow. Reaches 100–200 cm and immediately creates a dramatic garden effect.

• Planting: Pre-growing from March indoors, outdoor planting in May
• Depth: 10–15 cm
• Location: Full sun, nutrient-rich and adequately moist soil
• Blooming: July–October
• Overwintering: Dig, overwinter in peat at 5–10 °C

Freesia (Freesia)

Lightly fragrant pastel flowers on arching stems are popular as cut flowers. In Czech conditions they're not frost-hardy – preferably grow them in containers on terraces or balconies.

• Planting: March–April (in containers)
• Depth: 5–8 cm
• Location: Sun, well-draining substrate
• Blooming: June–August
• Tip: In a balcony container, freesias can be moved to shelter after flowering, and corms can be trimmed for winter storage.

Planting depth table

General rule: Plant to a depth of 2–3 times the bulb height. In heavier, clayey soil choose shallower planting – bulbs don't tolerate standing water.

Forcing bulbs indoors (forcing)

Forcing is a technique where you force spring bulbs to bloom indoors during winter months – in a vase, in a shallow dish with substrate, or in a pot. It's one of the most effective ways to enjoy spring fragrances and colors as early as January or February, long before outdoor warming.

Suitable varieties for forcing:

• Hyacinths – easiest and highest ornamental value thanks to intense fragrance
• Daffodils (Paperwhite, Tête-à-Tête) – Paperwhite requires no pre-chilling
• Crocuses – compact, reliable, and visually striking in shallow dishes
• Tulips – more demanding regarding precise chilling temperature
• Grape hyacinths – modest but highly effective in mass plantings

Step-by-step forcing procedure:

1. Chilling: Most bulbs (except Paperwhite daffodils) require 10–14 weeks at 5–9 °C – use a refrigerator, cool cellar, or garage. Store bulbs in a paper bag or directly in a pot with substrate to prevent crushing.
2. Planting: After chilling, place bulbs in a shallow dish with substrate or in a special forcing vase with water (especially hyacinths). Bulbs must sit tightly above water level – roots submerged, bulb base dry.
3. Darkness and cold: For 2–3 weeks, place containers in a dark and cool location (10–15 °C) until shoots reach 5–8 cm. This phase mimics natural soil conditions.
4. Light: Move to a bright location at 15–18 °C. Higher temperature hastens blooming but at the expense of quality and flower longevity.
5. Blooming: First flowers will appear in 2–4 weeks. After forcing, bulbs usually lack energy for repeat blooming – plant them in the garden and let them regenerate for 1–2 years.

Paperwhite daffodils – forcing without chilling:

These daffodils require no preparation or chilling. Simply place them in a shallow dish with decorative pebbles, add water so it touches the bulb base, and in 3–5 weeks they're in full bloom. Starting in late November, you'll have a perfect living Christmas decoration with natural fragrance.

Naturalization – bulbs in the lawn

Naturalization means planting bulbs in grass areas or under tree canopies where they self-reproduce and return year after year. The result is a natural meadow effect that, after initial work, requires virtually no maintenance.

Suitable varieties for naturalization:

• Crocuses – most popular choice, reliably spread and last decades
• Snowdrops – under deciduous trees eventually form extensive carpets
• Daffodils (botanical species) – poisonous, so immune to rodent and deer damage
• Grape hyacinths – eagerly spread; after years can form dense colonies
• Tulips (botanical species) – T. tarda, T. turkestanica, T. sylvestris

How to properly plant in lawn:

1. Take a handful of bulbs and loosely scatter them across the grass area
2. Plant them exactly where they land – random placement looks more natural than geometric patterns
3. For easier work, use a bulb planter – a hollow cylindrical tool that cuts a precise hole at the correct depth
4. After flowering, don't mow the grass where bulbs are planted until foliage completely yellows (at least 6–8 weeks after blooming) – otherwise bulbs won't accumulate nutrients for next year

Layered planting – lasagna method

Layered planting (lasagna planting) exploits the fact that different bulb types require different planting depths. In one container or bed, you can assemble three layers of blooming bulbs that succeed each other in sequence from February to June.

Basic layer scheme:

• Bottom layer (deepest): Late tulips – require deepest planting and bloom last
• Middle layer: Daffodils or hyacinths – medium depth, medium bloom time
• Top layer (shallowest): Crocuses or grape hyacinths – shallow planting, bloom first

Procedure for container planting:

1. Choose a sufficiently deep pot – minimum 30 cm depth
2. Add a drainage layer at the bottom (expanded clay or coarse gravel)
3. Substrate layer, then tulips tips up
4. Substrate layer (5–7 cm), then daffodils
5. Substrate layer (5–7 cm), then crocuses
6. Cover with final substrate layer and water
7. Leave the container outside over winter – bulbs need natural freezing

Result:

Crocuses bloom first (February–March), followed by daffodils (March–April), and tulips last (April–May). A single container thus provides three months of continuous blooming – from late winter through late spring.

Summer bulb and tuber storage through winter

Gladiolus, dahlias, cannas, tuberous begonias, and freesias are not frost-hardy in Czech climatic conditions. Proper digging and storage determines whether you'll have healthy planting material next year.

Step-by-step procedure:

1. Wait for first frost – let the aboveground part naturally die back; don't hurry
2. Dig tubers carefully with a garden fork; a spade can easily damage them
3. Remove soil – don't wash, moisture promotes rot
4. Cut back aboveground parts to 5 cm above the bulb or tuber
5. Dry for 1–2 weeks in a dry, well-ventilated place away from frost
6. Carefully inspect – immediately remove damaged, moldy, or soft pieces to prevent contamination of healthy ones
7. Store in boxes lined with peat, dry sawdust, or newspaper
8. Keep at 5–10 °C (cellar, heated garage, refrigerator)
9. Check monthly – address any signs of mold or rot immediately

Recommended storage temperatures:

FAQ – Most common questions

When do I plant tulips?

Tulips are planted in autumn, ideally in October to November. Later planting – even until December if the soil hasn't frozen – is actually advantageous: it reduces the risk of tulip fire, a fungal disease that spreads faster in warmer weather.

Why don't my tulips bloom in the second year?

Large-flowered garden hybrids are mostly a one-season proposition – the first year brings an impressive bloom, but subsequent years show significantly reduced performance. There are several reasons: inadequate nutrient storage in the bulb after flowering, too much shade, or premature foliage cutting. For reliable multi-year blooming without replanting, choose botanical tulips, which fully naturalize in beds.

Do I need to dig up tulips after flowering?

In Czech conditions, digging up isn't necessary – tulips commonly overwinter in the ground. Digging is recommended for rare or hard-to-find varieties and always where tulip fire occurred the previous year. If you dig up bulbs, wait until foliage completely yellows and store them in a dry, ventilated place until autumn.

How do I protect bulbs from rodents?

Mice and voles are especially attracted to tulips and crocuses. Effective measures:
- Planting in wire baskets with approximately 1 cm mesh – soil falls through, but rodents can't
- Combining with daffodils – they're poisonous and rodents avoid them, protecting neighboring tulips as well
- Loose gravel around bulbs – small stones mechanically discourage digging
- Growing in containers on terraces and balconies

How do I force hyacinths indoors?

Obtain pre-chilled bulbs – widely available from October onward in garden centers. Place them in a special forcing vase (holding bulbs tightly above water level) or in a pot with substrate. First 2–3 weeks in darkness and coolness (around 10 °C), then move to a bright location. At 15–18 °C, hyacinths will be in full bloom within 3–5 weeks.

What is layered planting (lasagna)?

The technique involves planting three bulb types stacked in one pot: tulips at the bottom, daffodils in the middle layer, crocuses nearest the surface. Because they bloom at different times, a single container ensures continuous flowering from February to May. Detailed instructions are in the chapter above.

Conclusion

Bulbs and tuber plants rank among the most rewarding groups of garden flowers. From early snowdrops to late dahlias, they can cover the entire growing season and repay minimal care with maximum effect. Success depends on observing correct planting time and depth, being patient with post-flowering foliage, and – for summer bulbs – careful winter storage. Browse our selection of bulbs and bulbs and tuber plants and plan a planting scheme that will enchant from the first snow through autumn frosts.

Sources

• Royal Horticultural Society (RHS) – Bulbs: rhs.org.uk/plants/types/bulbs
• Pavord, A. – The Tulip (Bloomsbury Publishing)
• Czech Garden Society – Bulbs in Czech gardens
• Netherlands Flower Bulb Information Center – Planting guides