Busy Lizzie Growing Guide: A Complete Guide to Growing Impatiens

01 · MEET THE PLANT

What a busy Lizzie is

A busy Lizzie is the common name for Impatiens walleriana, a half-hardy annual in the balsam family native to East Africa and grown throughout Britain for its knack of flowering freely in shade — a rare and useful trick among summer bedding^[3][4]. Yes, busy Lizzie and impatiens are the same plant: “busy Lizzie” is simply the traditional British name for it. The blooms come in white, pink, salmon, orange, red, lilac, and cheerful bicolours, on neat, self-branching plants. Being half-hardy, busy Lizzies won't survive a frost, so we grow them as annuals, planting out fresh each year once the weather has warmed.

It helps to know the family before you buy. The classic busy Lizzie (Impatiens walleriana) is the shade specialist this guide focuses on. New Guinea impatiens (Impatiens hawkeri) are larger and flashier and cope with more sun, while the SunPatiens range is bred specifically to flower happily in full sun as well as partial shade^[5]. For the American-spelling companion piece, see our impatiens growing guide.

02 · LIGHT & SHADE

The right amount of shade for busy Lizzies

Shade is where busy Lizzies shine. Classic Impatiens walleriana flowers best in partial or dappled shade — think the dappled light beneath a tree, or a north- or east-facing border — and a spell of gentle morning sun does no harm^[6]. What they can't abide is fierce afternoon sun, which scorches the leaves and bleaches the flowers. Cast the other way, deep gloom makes them leggy and shy to bloom. If the only spot you have bakes in full sun, plant SunPatiens or New Guinea types instead. Our impatiens light requirements guide has the full picture.

03 · WATERING

Watering busy Lizzies

Thirst is the busy Lizzie's defining quirk. They flag alarmingly the moment the compost dries, then perk up within an hour or two once watered — but let that happen again and again and you'll lose buds and vigour. Aim to keep the soil evenly moist, never sodden. Borders usually want a good soak once or twice a week; pots and troughs often need watering every couple of days, and hanging baskets in a warm spell can need it daily^[7]. Always water at the base of the plant rather than over the leaves — wet foliage is an open invitation to downy mildew.

04 · SOIL, PLANTING & SPACING

Soil, planting out, and spacing

Busy Lizzies want a rich, moisture-retentive soil that still drains freely. In borders, dig in plenty of well-rotted compost or leaf mould before planting; in containers, use a good multi-purpose compost and make sure every pot has drainage holes^[8]. Harden off young plants and plant out only after the last frost has passed — late May or early June across much of Britain — as cold soil sulks them badly. Space plants roughly 20–30 cm (8–12 in) apart: close enough to knit into a solid sheet of colour, far enough for the air to move between them, which is your first line of defence against disease.

05 · FEEDING & PINCHING

Feeding and pinching out

Because they flower without pause, busy Lizzies benefit from a little food, often. A balanced liquid feed at half strength every two to four weeks keeps the display going strong, or you can mix a slow-release fertiliser into the compost at planting and let it do the work^[9]. Go easy on high-nitrogen feeds, which give you leaves at the expense of flowers. Busy Lizzies are self-cleaning, so you needn't deadhead. If a plant grows lanky by midsummer, simply pinch out the growing tips by a few centimetres to encourage bushier, denser growth and a fresh flush of bloom.

06 · PROBLEMS & PESTS

Downy mildew and other troubles

• Downy mildew. This is the disease that reshaped how Britain grows busy Lizzies. Impatiens downy mildew (Plasmopara obducens) shows as pale, yellowing or mottled leaves with a fine white bloom on the undersides, then sudden leaf fall leaving bare, collapsing stems^[12]. It thrives in cool, damp, humid weather. Keep it at bay with generous spacing for airflow, watering at the base to keep leaves dry, and buying clean, healthy plants. If it appears, lift and bin affected plants (don't compost them); New Guinea impatiens and SunPatiens are resistant and make excellent stand-ins.
• Wilting. Nearly always dryness — busy Lizzies collapse fast and recover within hours of a drink. Wilting in wet compost instead signals root rot from overwatering or poor drainage.
• Pests. Slugs and snails enjoy young plants, red spider mite can appear in hot dry conditions, and aphids turn up now and then — deal with them promptly with the usual organic controls.
• Pet safety. Reassuringly, busy Lizzies are non-toxic to dogs, cats, and horses, so they're a safe choice for a family garden^[13].

07 · THE SEASON

Busy Lizzies through the British summer

Busy Lizzies are firmly a summer plant. Wait until frosts have finished and nights are mild before planting out; cold checks their growth, and the first autumn frost brings the display to a close^[10]. Between those two points they simply get on with it, flowering steadily from early summer well into autumn with little more than water and the occasional feed. They rarely need staking or fussing. If you're fond of a particular colour, take soft stem cuttings in late summer — they root readily — and grow them on a bright windowsill to plant out again the following year.

08 · CONTAINERS & BASKETS

Busy Lizzies in pots and hanging baskets

Few plants suit patio pots, window boxes, and hanging baskets as well as busy Lizzies, tumbling over the edges in a haze of colour all summer in the shadiest corner of the garden. The one thing that catches gardeners out is watering: baskets and small pots dry out remarkably quickly, and busy Lizzies are the first to wilt when they do. Choose a decent-sized container, a moisture-retentive compost, and check daily in warm weather. Consistent moisture — more than light or feed — is what keeps basket busy Lizzies looking their best, and a self-watering olla takes the daily worry out of it. To plan your display, see how tall do impatiens get.