How to grow hypoestes

What are hypoestes?

These small houseplants are also known as polka dot plants, although their brightly coloured leaves aren’t regularly spotted as this name implies – instead they’re often almost entirely splashed with colour. Different cultivars come in various shades of either pink, red or white, some with very little green, others with more.

Plants can grow to about 30cm (1ft) tall over time, but can be kept low and bushy by pinching out any tall, straggly shoots and flower stems.

As they need humid air, they are ideal for growing in a terrarium, or a humid bathroom. In dry air, the leaves can start to turn brown. Especially when sold in small pots, these plants can be relatively inexpensive, so it’s easy to put together a vibrant collection. Planting several different colours in one container can look very striking.

Choosing hypostes

Although only one species, Hypoestes phyllostachya, is widely sold as a houseplant, there are many cultivars that are very varied in appearance. Leaves splashed with red, pink and white are common, but these colours can range in intensity from bright magenta to coral, lavender and cream.

Select healthy plants that show no signs of withering, leaf browning or damage, and have well-developed roots. Inspect the leaves for any insects too.   

Buying hypoestes

Hypoestes are often sold in multi-packs or as reasonably priced small potted plants in the houseplant area of garden centres and from online retailers. Although generally sold without cultivar names in mixed selections, you may see the following for sale:

• ‘Carmina’ – reddish-pink 

• ‘Rose Splash’ – rose pink 

• ‘White Splash’ – bright white 

• ‘Pink Splash’ – lavender pink   

Hypoestes grow well planted in a terrarium or large glass jar, where the humidity is high. See our video guide to planting a terrarium:

Location

Hypoestes like humidity, so grow best in a terrarium. A bright steamy bathroom or kitchen is also a good location. Humidity can also be created elsewhere by standing the pot on a wide tray filled with gravel or clay granules that’s topped up with water regularly. 

To ensure the best leaf colour, hypoestes need plenty of light, but not direct, strong sunshine. The temperature should always be at least 12°C (54°F).  

Watering 

Keep the compost moist but allow the surface to dry out slightly between waterings. Underwatered plants will show you they need watering by drooping or wilting. Although this looks worrying, they will soon recover once watered thoroughly (provided you don’t leave it too long). 

If grown in a terrarium or sealed glass container, they need watering less frequently, as the high humidity means the compost doesn’t dry out as quickly. 

For more on watering houseplants, see our quick video guide:

Humidity

Hypoestes need high humidity to keep their foliage looking good – in dry air the leaves start to brown at the edges. The easiest option is to plant them in a terrarium, or keep them in a steamy bathroom. Alternatively, you can raise the humidity by misting the leaves regularly, or sitting the pot over a tray of damp gravel. See our video guide for full details:

Feeding

To boost growth you can feed during the growing season (April to September) every two or three weeks using a liquid general-purpose or houseplant fertiliser. Follow the manufacturer’s instructions to avoid overfeeding, which can lead to tall, spindly shoots.

Hypoestes is easy to propagate using the following methods:

• Divide a large clump in spring by separating the rootball into several pieces with your hands, then pot up individually. Ensure each new plant has three or more stems 

• Sow seeds in spring onto moist compost, pressing them down gently, but not covering them (light stimulates their germination). Prick out the seedlings and pot up individually. The amount of colourful spotting on plants grown from seed can be variable. Seeds are available from a few online stockists

• Take softwood stem-tip cuttings in spring and summer. Cut a stem around 5cm long from the plant, severing just below a pair of leaves. Insert into a pot of moist peat-free compost. Keep humid (in a propagator or sealed clear bag) until well-rooted

Although generally trouble free, these plants are sometimes susceptible to:

• Leaf yellowing and leaf drop – caused by poor growing conditions such as over- or underwatering. See our quick video guide to houseplant watering

• Loss of leaf colouring – leaves may become green due to reversion or insufficient light, while too much sun can fade the vibrant colours 

• ​Browning leaf tips and margins – may be caused by low humidity. Watch our video guide to raising humidity

• Spindly, weak growth – if plants don’t get enough bright, indirect light. See our quick video guide to light levels

• Sap-sucking insects – look out for mealybugs, aphids and red spider mites

• Powdery mildew – especially when plants are too dry, due to underwatering and/or low humidity

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