Types of flowers: 20+ annuals & perennials for any garden

Types of flowers: 20+ annuals & perennials for any garden

Standing in front of the seed rack at a garden center feels overwhelming when nothing tells you whether the packet will give you flowers for two months or twenty years. The good news: the entire ornamental flower category sorts into four functional types based on life cycle, and once you understand which type you are buying, every other care decision (when to plant, how much to water, whether to expect repeat blooms) falls into place. This guide covers the 20+ most popular flowers in US and UK gardens, grouped by life cycle, with bloom season, sun needs, and pet safety for each one. We have flagged toxic-to-pets species using the ASPCA toxic plants database so you can pick safely if you have cats or dogs.

Match flowers to your bed: Photograph your garden in Growli and we measure the light — then rank the flower types most likely to thrive at that exposure.

How we group the 4 types

The single most important distinction in ornamental flower gardening is the plant's life cycle:

1. Annuals — germinate, flower, set seed, and die in a single season. Replanted every spring. Maximum bloom volume per square foot.
2. Perennials — die back to the ground in fall but return from the same roots every spring. Bloom for weeks at a time, year after year, for 3–10+ years.
3. Biennials — two-year cycle. Year one is leafy growth; year two is bloom and seed-set, then the plant dies. Often self-seeds so you get continuous bloom from a single planting.
4. Bulbs (geophytes) — store energy in an underground bulb, corm, tuber, or rhizome. Plant in fall, bloom in spring, dormant in summer. Most return for years if planted in suitable conditions.

A fifth informal group — flowering shrubs like hydrangea, lilac, rose, and rhododendron — is technically perennial but woody. We cover hydrangea below and roses in our dedicated types of roses guide.

Annual flowers — instant color, one season

Annuals are the workhorse of summer color. You sow them in spring (or buy six-packs at the garden center), enjoy 8–16 weeks of nonstop bloom, and pull them at the first hard frost. Annuals give more bloom-per-square-foot than any other category and are ideal for containers, hanging baskets, and front-of-border seasonal color.

1. Marigold — Tagetes spp.

The yellow-orange-red workhorse. Direct-sow after the last frost or buy in six-packs in spring. Blooms for 4–5 months straight, deters some insect pests, and tolerates poor soil and heat better than almost any other annual. French marigolds (T. patula) stay compact (6–12"); African / American marigolds (T. erecta) reach 2–3 ft. Pet safety: ASPCA lists Tagetes (marigold) as non-toxic to dogs, cats, and horses for most species, though minor skin contact irritation can occur.

Care signal: Full sun, modest watering, deadhead for repeat bloom.

2. Zinnia — Zinnia elegans

The easiest annual to grow from seed. Germinates in 5–7 days, blooms in 60 days from sowing, and produces cut flowers from July through frost. Comes in nearly every color except true blue. 'Cut and Come Again', 'State Fair', and 'Profusion' are reliable beginner cultivars. Butterfly magnet. Pet safety: ASPCA-listed as non-toxic to cats and dogs.

Care signal: Full sun, deep weekly water, deadhead aggressively.

3. Petunia — Petunia x hybrida

The hanging-basket and window-box standard. Trumpet-shaped blooms in every color, including bicolor patterns. Wave and Supertunia series spread 2–4 ft from a single plant and bloom continuously without deadheading. Calibrachoa ("million bells") is a close cousin. Pet safety: ASPCA lists petunias as non-toxic to cats and dogs.

Care signal: Full sun, daily watering in containers, weekly liquid feed.

4. Cosmos — Cosmos bipinnatus

Tall, feathery-foliaged daisy-relatives in pink, white, and crimson. Self-seed prolifically once established. Pollinator magnet. Cosmos look unstructured and "wild" — ideal for cottage gardens, cutting beds, and meadow plantings. Pet safety: ASPCA-listed as non-toxic.

Care signal: Full sun, modest water, stake taller cultivars.

5. Sunflower — Helianthus annuus

The classic single-stem giant. From seed to 6+ ft in a single season with almost no effort. Cultivars range from dwarf 'Sunny Smile' (24") to 'Mammoth' (12 ft+). Provides cut flowers, edible seeds, and a striking summer accent. Pet safety: ASPCA lists Helianthus as non-toxic.

Care signal: Full sun, deep watering, stake taller cultivars.

6. Impatiens — Impatiens walleriana

The shade-garden workhorse. Compact, mounding habit with flat flowers in pink, red, white, salmon, and bicolor patterns. New Guinea impatiens (I. hawkeri) tolerate partial sun. Pet safety: ASPCA-listed as non-toxic.

Care signal: Part to full shade, even moisture, no deadheading needed.

7. Begonia — Begonia spp.

Compact mounding plants with waxy leaves and continuous bloom. Wax begonias (B. semperflorens) and tuberous begonias dominate retail. Tolerates more sun than impatiens. Pet safety: ASPCA lists begonias as toxic to cats, dogs, and horses (soluble calcium oxalates — chewing causes oral irritation and vomiting).

Care signal: Part shade to filtered sun, even moisture.

8. Snapdragon — Antirrhinum majus

Tall spikes of "dragon-mouth" flowers in nearly every color. Cool-season annual — peaks in spring and fall, sulks in midsummer heat. Reseeds in mild climates. Pet safety: Non-toxic per ASPCA-derived lists.

Care signal: Full sun, even moisture, deadhead for repeat spikes.

Perennial flowers — plant once, bloom for years

Perennials are the backbone of an established garden. Most bloom for 2–6 weeks each year, but they return reliably year after year from the same crown. Plant a mix of early, mid, and late bloomers to keep something flowering from April through October.

9. Peony — Paeonia spp.

The classic late-spring perennial. Massive 4–6 inch fragrant blooms in white, pink, coral, and crimson. Lives for 50+ years once established. There are three forms — herbaceous peonies (die back to ground), tree peonies (woody, stay standing in winter), and Itoh hybrids (cross of the two) — and our guide to the main types of peonies walks through the bloom forms and reliable cultivars in each. 'Sarah Bernhardt' (pale pink) and 'Karl Rosenfield' (red) are the most dependable starting choices. Pet safety: ASPCA lists peony as toxic to dogs, cats, and horses (paeonol — vomiting, depression, diarrhea).

Care signal: Full sun, deep weekly water in dry spells, no fertilizer needed once established.

10. Daylily — Hemerocallis spp.

Each bloom lasts one day, but a mature plant produces dozens of buds for 4–6 weeks. Strap-like foliage forms a clump 2–3 ft wide. Thousands of cultivars in every color but true blue. 'Stella de Oro' (yellow, repeat-blooming) is the most-planted daylily in the US. Pet safety: Daylilies are highly toxic to cats (can cause acute kidney failure) per ASPCA. Mildly toxic to dogs.

Care signal: Full sun to part shade, drought-tolerant once established.

11. Coneflower — Echinacea purpurea

Native to US prairies. Daisy-form flowers with raised central cones, in purple, pink, orange, yellow, white, and red. Blooms from midsummer through fall. Pollinator and goldfinch magnet. Echinacea is also a medicinal herb. Pet safety: Non-toxic per ASPCA-derived lists.

Care signal: Full sun, drought-tolerant, leave seed heads for winter interest and bird food.

12. Hosta — Hosta spp.

The shade-perennial workhorse. Grown primarily for foliage — broad heart-shaped leaves in green, blue-green, gold, and variegated patterns — though lavender or white flowers appear on tall stems in summer. Hostas range from 6" miniatures to 'Empress Wu' at 6 ft wide. Pet safety: ASPCA lists hostas as toxic to dogs, cats, and horses (saponins — vomiting, diarrhea, depression).

Care signal: Part to full shade, even moisture, slug protection.

13. Hydrangea — Hydrangea spp.

Technically a flowering shrub but treated as a perennial in most garden plans. Mophead (H. macrophylla) blooms blue or pink depending on soil pH; oakleaf (H. quercifolia) is the US native; PeeGee (H. paniculata) blooms white to pink in late summer. Because pruning timing and color control differ sharply between these groups, see our breakdown of the types of hydrangeas before you cut anything back. Pet safety: ASPCA lists hydrangea as toxic to dogs, cats, and horses (cyanogenic glycosides — vomiting, depression).

Care signal: Part shade to full sun (varies by species), deep weekly water, prune by species.

14. Black-eyed Susan — Rudbeckia hirta / R. fulgida

Native US prairie daisy. Yellow petals with dark central cone. Blooms midsummer through fall. 'Goldsturm' is the most-planted cultivar. Pollinator favorite. Pet safety: Mildly toxic to cats and dogs (mild GI upset) — keep dried plants away.

Care signal: Full sun, drought-tolerant, divide every 3–4 years.

15. Phlox — Phlox paniculata (tall) and P. subulata (creeping)

Tall garden phlox produces 3-inch trusses of fragrant pink, white, lavender, or red flowers in midsummer. Creeping phlox carpets sunny slopes in spring with tiny pink-purple-white flowers. Pet safety: Non-toxic per ASPCA.

Care signal: Full sun, good air circulation (powdery mildew prone), divide every 4 years.

16. Salvia — Salvia spp.

Tall spikes of small tubular flowers in purple, red, pink, white, and blue. Salvia nemorosa 'Caradonna' (deep purple, sterile, long-blooming) is the US perennial Plant of the Year (2003). Pollinator magnet. Pet safety: ASPCA-listed Salvia species are generally non-toxic.

Care signal: Full sun, drought-tolerant, deadhead for repeat bloom.

Biennial flowers — second-year bloomers that self-seed

Biennials confuse new gardeners because they look "wrong" in year one — just a rosette of leaves at ground level. Year two delivers the show: tall flower spikes, seed set, and (in most species) free volunteers in year three because they self-sow. The trick is to plant two consecutive years so you always have a flowering generation.

17. Foxglove — Digitalis purpurea

Spectacular spires of tubular flowers in pink, white, purple, and apricot. Native to UK woodland edges; widely naturalized in US gardens. Self-seeds prolifically. Pet safety: HIGHLY TOXIC — DO NOT PLANT WHERE PETS OR CHILDREN CAN ACCESS. ASPCA lists foxglove as toxic to dogs, cats, and horses. The entire plant contains cardiac glycosides (digoxin) — ingestion causes vomiting, irregular heartbeat, and can be fatal. Treat foxglove with the same caution as oleander or yew.

Care signal: Part shade, even moisture, deadhead spent spikes to extend bloom.

18. Hollyhock — Alcea rosea

Cottage-garden classic. Tall spires (5–8 ft) of saucer-shaped flowers in pink, white, red, yellow, and near-black. Vulnerable to hollyhock rust — site in airy spots and remove infected leaves. Pet safety: Non-toxic per ASPCA.

Care signal: Full sun, stake tall spikes, remove rust-affected leaves.

19. Sweet William — Dianthus barbatus

Dense clusters of small fragrant flowers in pink, red, white, and bicolor patterns. Often grown as a short-lived perennial in mild climates. Pet safety: ASPCA lists Dianthus (carnations) as toxic to cats and dogs — mild GI upset, mild dermatitis. Sweet William is the same genus and similar caution applies.

Care signal: Full sun, deep weekly water, deadhead.

Bulb flowers — fall planting, spring reward

Bulbs are storage organs that let the plant survive dormancy. You plant most spring-flowering bulbs in fall (mid-October to early December in most US zones, similar in the UK), when soil temperatures drop to 40–50°F, and they bloom the following spring once they have had a cold treatment. Daffodils naturalize and multiply; tulips give one strong year and decline thereafter in warm zones. Summer-flowering tubers belong here too — the full range of dahlia varieties, from pompon to dinnerplate, is planted after the last frost rather than in autumn.

20. Tulip — Tulipa spp.

The spring bulb. Cup-shaped flowers on single stems in every color and many bicolors, spread across Single, Double, Parrot, Triumph, and Darwin divisions — our types of tulips guide explains which divisions perennialize and which are best treated as annuals. Plant 6–8 inches deep in October–November. Performs as a true perennial only in cold-winter zones (3–7); in zones 8+ many gardeners treat them as annuals. Pet safety: ASPCA lists tulips as toxic to dogs, cats, and horses — bulbs are the most dangerous part, containing tulipalin glycosides. Significant stomach upset, depression, and possible intestinal obstruction if bulbs are ingested.

Care signal: Full sun, plant in fall, well-drained soil.

21. Daffodil / Narcissus — Narcissus spp.

The spring bulb that lasts. Yellow or white flowers with a central trumpet, often fragrant, ranging from trumpet to large-cup to fragrant jonquilla forms — the types of daffodils guide covers all thirteen RHS divisions and which naturalize best. Daffodils naturalize in lawns and woodland edges and are deer and rodent-proof because the bulbs contain lycorine. Pet safety: ASPCA lists daffodils as toxic to dogs, cats, and horses — contain lycorine. Vomiting, salivation, diarrhea; large ingestions cause convulsions, low blood pressure, tremors, and cardiac arrhythmias. Bulbs are the most poisonous part.

Care signal: Full sun to part shade, plant in fall, leave foliage to die back naturally.

22. Hyacinth — Hyacinthus orientalis

Dense spikes of intensely fragrant tubular flowers in pink, purple, blue, white, yellow, and salmon. Plant in fall. Often forced indoors in winter for fragrant pots. Pet safety: ASPCA lists hyacinth as toxic to dogs, cats, and horses (similar alkaloids to daffodil). Bulbs are the most toxic part.

Care signal: Full sun, plant in fall, well-drained soil.

23. Crocus — Crocus spp.

The earliest spring bulb — often through snow. Cup-shaped purple, yellow, white, or striped flowers on 4–6 inch stems. Naturalizes in lawns. Pet safety: Spring crocus (Crocus spp.) is mildly toxic per ASPCA — GI upset. Autumn crocus (Colchicum autumnale) is highly toxic and should not be planted where pets graze.

Care signal: Full sun, plant in fall, very low maintenance.

24. Allium — Allium spp.

Ornamental onion relatives — globe-shaped purple, white, or blue flower heads on tall stems. Plant in fall, blooms late spring. Deer and rodent-proof. Pet safety: ASPCA lists Allium species as toxic to dogs and cats (similar to onion and garlic). Avoid letting dogs chew the bulbs.

Care signal: Full sun, well-drained soil, plant in fall.

25. Lily — Lilium spp.

True lilies grow from bulbs, bloom on tall stems in midsummer, and produce 4–8 inch trumpet- or recurved-shaped fragrant flowers. Asiatic, Oriental, and Trumpet lilies are the main retail categories. Pet safety: HIGHLY TOXIC TO CATS — even small ingestion of pollen, leaves, or water from the vase can cause acute renal failure. Per ASPCA, all true Lilium species and many Hemerocallis (daylily) species are dangerous to cats. Do not bring cut lilies into a home with cats. Do not plant true lilies where indoor-outdoor cats roam. Dogs are less severely affected (GI upset).

Care signal: Full sun to part shade, plant bulbs in fall or spring.

How to choose the right type of flower

Start with your bloom calendar goal. Do you want a 12-week explosion of color from June through August in window boxes? Pick annuals — petunia, marigold, zinnia, and sunflowers will saturate the space. Do you want a low-maintenance bed that returns for 5+ years? Pick perennials — peony, daylily, coneflower, hosta. Do you want a spring bulb display in March before anything else has woken up? Pick crocus, daffodil, tulip, and hyacinth planted the previous fall.

Check light. Full sun (6+ hours) opens up almost everything — start with our list of reliable full-sun perennials. Part shade (3–6 hours) eliminates sunflower, zinnia, and most bulbs but is heaven for hosta, hydrangea, foxglove, impatiens, and begonia; the shade-loving perennials guide covers the best of them. Full shade (under 3 hours) limits you to hosta, impatiens, and a handful of specialty perennials.

Match the style. The same flower types read very differently depending on layout: a relaxed cottage garden, a restrained Japanese garden design, a low-water xeriscape, or a habitat-first wildlife garden. Pick the style before the plant list.

Check pet safety before planting. Tulips, daffodils, hyacinth, lily, foxglove, peony, hosta, hydrangea, daylily, and crocus are all on the ASPCA toxic-to-pets list. If you have a dog that chews garden plants or a cat that goes outdoors, design beds with pet-safe alternatives or fence the toxic ones. Cut lilies brought indoors are a leading cause of cat poisoning emergency-vet visits.

Mix life cycles. A garden that uses 60% perennials + 20% annuals + 20% bulbs gives you continuous bloom from March through October with minimal replanting. Pure-annual beds need replanting every spring; pure-perennial beds have gaps in bloom timing.

Common care across the category

Plant at the right depth. Bulbs go in three times their height deep. Annuals and perennials plant at the same depth they came in the nursery pot — no deeper, no shallower. Burying a perennial crown causes rot.

Mulch 2 inches deep with compost, shredded bark, or leaf mold in spring. Mulch conserves moisture, suppresses weeds, and slowly feeds the soil.

Deadhead annuals aggressively to keep them flowering. Most perennials don't strictly need deadheading but bloom longer when you do. Bulbs should be deadheaded after bloom (so they don't waste energy on seed) but the leaves must be left until they yellow naturally — the bulb is recharging.

Feed appropriately. Annuals are heavy feeders — weekly liquid feed in containers. Perennials want a single spring application of balanced fertilizer or compost top-dressing. Bulbs want bone meal or bulb-specific fertilizer at planting, then nothing for years.

Try Growli: Snap a photo of any flower with Growli — get instant ID and care plan in 60 seconds.

Related articles

• Types of roses — 12 varieties for every garden style — the rose deep dive
• Types of trees — 25 species by climate and use — for combining trees with flower beds
• Companion planting guide — what to plant near vegetables and herbs
• Pet-safe houseplants — 20 non-toxic plants — for indoor pet-safe alternatives
• Garden pest identification — the pest pressure across flower types
• Easiest vegetables to grow — for combining edibles with flowers

Reviewed and updated by the Growli editorial team. For questions about anything here, open Growli and ask — or email hello@getgrowli.app.