Brunfelsia Care: Grow the Plant That Shows Purple, Lavender, and White Flowers at Once

Look at a brunfelsia in full bloom and you will see something most flowering plants cannot manage: three distinct colours on the same shrub at the same time. The freshest blooms are a deep, saturated purple. Flowers that opened a day or two ago have faded to soft lavender. And the oldest — still holding on at the ends of their stems — have turned completely white. This is why the plant is known as Yesterday-Today-Tomorrow, and it is the reason gardeners who grow it rarely want to stop.

Brunfelsia pauciflora is a subtropical shrub native to Brazil, grown as an evergreen in USDA hardiness zones 9 to 11 and as a container houseplant everywhere else. With the right conditions, it blooms repeatedly through spring and summer, putting on a colour display that genuinely earns its reputation. This guide covers everything you need — from the science behind the colour change to a season-by-season care plan — so you can get the most out of this remarkable plant. For a broader foundation, the complete guide to indoor plant care covers the principles that apply to every houseplant.

Why Brunfelsia Flowers Change Colour: The Science Explained

The colour shift is not a mystery — it is a measurable biological process driven by pigment loss. The purple colour in a fresh brunfelsia flower comes from anthocyanins: water-soluble pigments found in many plants, from blueberries to red cabbage. In brunfelsia, the three main anthocyanins are malvidin-3-O-glucoside chloride, petunidin-3-glucoside, and delphinidin-3-glucoside. These pigments require a continuous production pathway to remain visible in the petal cells.

That pathway depends on three key genes: CHS (chalcone synthase), F3′5′H (flavonoid 3′5′-hydroxylase), and CHI (chalcone isomerase). A 2019 proteomics study of Brunfelsia acuminata flowers — published in peer-reviewed form via PubMed Central — found that all three genes are progressively and significantly down-regulated from the first day of a flower’s life to the fifth. As the genes switch off, anthocyanin production drops, and the purple colour fades through lavender to white.

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The reason the plant does this is resource competition. As a flower ages, the metabolic resources that were going into pigment synthesis get redirected. The competing pathways produce volatile fragrance compounds and structural lignin — the biological equivalent of the flower swapping colour investment for scent production. Enzyme activity linked to cellular senescence (including peroxidase, superoxide dismutase, and catalase) spikes sharply at day five, confirming an active ageing process is under way.

The practical result: a newly opened flower is purple on day one, lavender by day two or three, and white by day four or five. Because flowers open at different times across the shrub, you always see all three stages together. Purple buds opened today will be lavender tomorrow, and white the day after — but new purple flowers will keep opening to replace them, keeping all three colours present simultaneously for weeks at a time.

Light: Getting the Balance Right Indoors

Brunfelsia blooms on new growth — which means flowering depends entirely on producing vigorous new shoots, and that requires adequate light. Indoors, plan for at least three to four hours of direct sunlight daily. A south- or east-facing window is the first choice: morning sun is direct without the intense heat of afternoon, and the plant handles it well through summer. A west-facing window works too, though you may need to shade the plant slightly in high summer to prevent scorching.

Dappled or bright indirect light all day is acceptable if the direct-sun window is not available, but expect fewer flowers: the plant will stay healthy but may not generate enough new growth to set buds consistently. What does not work is a north-facing window or any genuinely shaded spot — in low light, you get foliage but very little bloom.

If your natural light is consistently low — below about 1,000 lux — supplement with a full-spectrum LED grow light running 12 to 14 hours a day, positioned 12 to 16 inches above the canopy. This is particularly useful during winter months when daylight hours are short, and it will help trigger the spring flowering flush that brunfelsia is capable of producing.

Watering and Soil

Brunfelsia wants consistently moist soil, not wet soil. The distinction matters. This is a plant that declines in waterlogged conditions just as quickly as it does when allowed to dry out completely. For a potted plant indoors, let the top inch of compost dry between waterings, then water thoroughly until liquid drains from the bottom of the pot. Tip the saucer out after 20 minutes — standing water encourages root rot.

In winter, when growth slows or stops altogether, reduce watering further. The plant often goes partially or fully deciduous in cool, low-light conditions — this is a normal rest-period response, not a sign of trouble. Resume normal watering as soon as you see new growth returning in late winter or early spring.

Soil acidity is critical. Brunfelsia needs a pH of 5.5 to 6.5 — the same range used for azaleas and camellias. Use ericaceous (acid) compost as your base, or improve standard potting mix with one-third bark chips to lower the pH and improve drainage. Mulch the surface with pine bark or needles to maintain acidity and conserve moisture. If you are in a hard-water area, regular tap water will raise your soil pH over time. Using collected rainwater or filtered water makes a real difference to leaf colour and long-term flower production.

Temperature and Humidity

Brunfelsia originates from subtropical Brazil, and its preferences make that ancestry clear. During active growth, keep temperatures between 60 and 80°F (15–27°C). In winter, the plant handles cooler conditions of 50 to 55°F (10–13°C) without complaint, and a cool rest period may actually improve the spring flowering flush. Do not allow temperatures to drop below 50°F (10°C) for extended periods, however — sustained cold below that threshold causes leaf drop and can damage roots in containers.

Humidity matters indoors, particularly in heated homes where winter air can become very dry. Place the pot on a pebble tray filled with water, with the pot base sitting above the waterline (not in it) — as the water evaporates, it raises ambient humidity around the foliage. For more humidity-raising strategies that work across a range of houseplants, see our guide on how to increase humidity for houseplants.

How to Feed Brunfelsia

Because brunfelsia both blooms on new growth and requires acidic soil, the choice of fertilizer matters more than it does for most houseplants. A standard balanced fertilizer will push growth but does nothing to maintain soil acidity, and over time the pH drift will reduce both leaf colour and flowering. Use a liquid fertilizer formulated for acid-loving plants — products designed for azaleas and camellias are ideal, as they contain acidifying compounds alongside nutrients.

During the active growing season (spring through early autumn), apply the fertilizer at half-strength every two weeks. From mid-autumn through winter, stop feeding entirely. Pushing growth with fertilizer during the rest period produces weak, pale new shoots that are prone to pests and rarely develop into flowering stems. For a solid grounding in when and how to feed houseplants generally, our guide to fertilizing houseplants explains N-P-K ratios and how to read a fertilizer label.

Pruning for Continuous Blooms

The single most effective thing you can do to encourage more brunfelsia flowers is to prune promptly after each flowering cycle. Because the plant blooms on new growth, every time you cut a flowered stem back by about a third, you are directing the plant’s energy into producing fresh new shoots — the very shoots that will carry the next round of blooms. A light trim after flowering keeps the plant bushy and productive rather than letting it extend into a loose, open shape that flowers at the tips only.

For container plants brought indoors in autumn (zones 8 and colder), cutting back by up to half before moving them in manages size and triggers a strong new-growth flush the following spring. In zones 9 to 11 where the plant lives outdoors year-round, a harder prune in autumn shapes the shrub without sacrificing the coming season’s bloom.

The timing rule to avoid: never prune in late summer or early autumn while flower buds are already forming. Wait until the current flowering cycle finishes. Cutting into developing buds is the most common reason gardeners get a disappointing display in the following season.

How to Propagate Brunfelsia

Brunfelsia propagates reliably from softwood tip cuttings taken in spring, when the plant is producing fresh new growth. Take a cutting around four to five inches (10–13 cm) long from the growing tip of a healthy stem. Remove all but the top two or three leaves. Dip the cut end in rooting hormone powder and insert it into a mix of equal parts peat moss and perlite — this combination holds just enough moisture while keeping the growing medium aerated enough to prevent rot.

Place the cutting in bright, filtered light — not direct sun, which will stress an unrooted cutting before it can establish. Cover the pot with a clear plastic bag or propagation dome to maintain the high humidity that speeds rooting. Keep the mix lightly moist. Roots typically form within two weeks. Test by applying gentle upward pressure on the stem: light resistance means root development has begun. Once rooted, harden the cutting off gradually over several days — open the humidity cover for longer periods each day before removing it entirely.

Common Problems: Diagnostic Guide

Brunfelsia grown indoors is susceptible to a standard cast of houseplant pests, most of which thrive when air is too dry or air circulation is poor. The table below covers the issues you are most likely to encounter.

Toxicity: Keep Pets and Children Away

Brunfelsia carries a serious toxicity warning that should inform where you place the plant in your home. The toxic compound is brunfelsamidine, an alkaloid that disrupts the nervous system. According to the ASPCA, all parts of the plant are toxic to dogs, cats, and horses. Symptoms following ingestion include tremors, seizures that can last several days, vomiting, diarrhea, hypersalivation, lethargy, incoordination, and coughing. Clinical signs can appear within two hours of ingestion.

If you suspect your pet has eaten any part of this plant, call the ASPCA Animal Poison Control Center at (888) 426-4435 immediately, or go straight to a veterinarian without waiting for symptoms to develop. Do not delay: the speed of onset and the potential for multi-day seizure activity make this plant a genuine veterinary emergency.

For humans, the berries are the most dangerous part, and contact with the sap during pruning can cause skin and oral irritation. Wear gloves when trimming and wash your hands thoroughly afterwards. If you have young children or pets at home and want flowering plants without the risk, our list of pet-friendly non-toxic houseplants offers safe alternatives.

Seasonal Care Calendar for Indoor Growers

The table below gives a clear plan for container-grown brunfelsia through the year, covering the tasks that matter most in each season.

Frequently Asked Questions

Why does my brunfelsia only show white flowers?

White flowers are the final stage of the bloom cycle — they are the oldest flowers on the plant. If all your flowers are white, new buds are not opening to replace them. This usually means the current flowering flush has ended, or that insufficient light is preventing the plant from generating new budded growth. Move to a brighter spot and wait for the next cycle of growth and flowering to begin.

How big does brunfelsia get as a houseplant?

In a container, brunfelsia typically reaches three to five feet tall with a similar spread under indoor conditions. Regular light pruning after flowering keeps it compact and productive. Left unpruned outdoors in zones 9 to 11, the plant can reach seven to ten feet tall with a spread of five to eight feet.

Is brunfelsia the same as Yesterday-Today-Tomorrow?

Yes. Brunfelsia pauciflora is the species most commonly sold under the Yesterday-Today-Tomorrow name. Brunfelsia grandiflora and Brunfelsia australis are also sold under the same common name; care requirements are essentially identical across all three species, and the progressive three-colour display is consistent across the genus.

Can I keep brunfelsia outdoors in summer and bring it in for winter?

Yes — this is the standard approach for gardeners in zones 8 and colder. Move it to a sheltered patio or garden position with morning sun once overnight temperatures are reliably above 50°F in late spring. Prune back and bring indoors again in early autumn before the first frost risk. The summer outdoor period, with higher light levels and natural humidity, often produces the best flowering display of the year.

Sources

[1] Brunfelsia pauciflora — NC State Extension Gardener Plant Toolbox

[2] FPS77/FP077: Brunfelsia grandiflora Yesterday, Today, and Tomorrow — UF/IFAS Extension

[3] ASPCA Animal Poison Control — Brunfelsia: aspca.org/pet-care/animal-poison-control/toxic-and-non-toxic-plants/brunfelsia (hyperlink in body above)

[4] Proteomics Reveal the Profiles of Color Change in Brunfelsia acuminata Flowers — PubMed Central (2019)

[5] Yesterday Today and Tomorrow: How To Grow and Care For Brunfelsia — Plant Care Today