Polka dot plant

Growing in Pots, Balconies & Indoors

The grower confirms the polka dot plant grows happily indoors as a houseplant, with one caveat in his own words: it must have plenty of light to keep its bold leaf colour, and it likes humidity. It is small, fast-growing and colourful – an ideal pot plant for a bright room.

Quick Details

• Container Size: Start with a pot 50-70% larger than the root ball (use the smaller end for bigger plants) – the grower’s own guidance
• Indoor Suitability: Good houseplant – but it needs strong light for colour, plus humidity
• Best Spot: Bright light without direct midday sun, which burns the leaves
• Soil & Drainage: Potting mix or peat soil with perlite; must drain freely
• Watering in Pots: Keep evenly moist – it is sensitive to swings in watering and sulks or loses colour if it dries out or stays soggy

Indoors & On the Windowsill

• A houseplant that needs light: The grower stresses that indoors it must have plenty of light to hold strong colour – too little and the leaves fade toward plain green; too much direct sun and they scorch.
• Humidity and upkeep: It likes humid air; the grower’s indoor routine is to prune once a year, keep the light and humidity up, and feed once a year in spring.
• Windowsill: A bright sill with strong but filtered light keeps the colour vivid; keep it away from cold draughts.

On a Balcony or Patio

• Light & shelter: Outdoors only above about 15C (59F); the grower advises a sheltered spot as it dislikes wind, yet still wants plenty of light to keep the colours from turning green.
• Overwintering: It is frost-tender (a cold-climate annual) – bring it in or take cuttings before the cold and grow it on as a houseplant.

Choosing the Pot, Soil & Long-Term Care

• Pot & drainage (grower’s method): Fit a saucer under the pot; when you water, let it fill the saucer but make sure it also drains away the same day – if water sits, the mix is too heavy or the pot needs more holes.
• Potting mix: Potting mix or peat soil with perlite, as the grower specifies; a light, aerated blend of peat or coir with perlite gives roots both moisture and air.
• Feeding: The grower feeds once a year in spring; potted plants leach nutrients, so a little regular feeding in the growing season also suits it.
• Repotting (grower’s method): Repot into the next size up each time it fills the pot, until it reaches the size you want; refresh the tired soil every few years, and if the plant is hard to lift, replace some soil from the side and lightly prune the plant and roots.

Grower’s Container Tip

• Right-sizing the pot: The grower starts each plant in a pot 50-70% bigger than its root ball – using the smaller percentage for larger plants – then steps it up as it fills out, rather than over-potting from the start.

Bloom & Flower Guide

Quick Details

• Bloom Season: Summer
• Flower Appearance: Small purple flowers carried on slender stems
• Edibility: Ornamental only, but non-toxic and considered safe around pets

Detailed Blooming Overview

The polka dot plant is grown entirely for its pink-, red- or white-freckled leaves, and flowering is a minor affair. In summer it can send up slim stems topped with small purple flowers. Because blooming often signals the plant is stretching and about to fade, many growers pinch out the flower stems to keep the colourful foliage compact.

Flower Characteristics

• Small purple flowers on thin, upright stems.
• Modest and short-lived compared with the showy leaves.

Bloom Care & Thinning

• Managing the bloom: Pinch off the flower stems as they appear to prolong the leafy display and prevent the plant going lanky.
• Keeping it bushy: Regular pinching of shoot tips keeps growth dense and delays flowering.