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Nemesia, abundant and lively blooming

Nemesia
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Nemesia is a cute little flower that many find appealing for the beauty and abundance of its warm-colored blooms.

Nemesia at a glance
Name Nemesia
Family Scrophulariaceae
Type Annual or perennial depending on the variety
Height 12 to 20 inches (30 to 50 cm) depending on the variety
Exposure Full sun, part sun
Soil Rather rich
Flowering Early summer to early autumn

In flower beds, along edges, in garden boxes or hanging pots, it is extremely ornamental and growing it is very easy.

Planting nemesia

Sowing nemesia

Most appropriate is to sow in a sheltered spot starting from the month of March and put in place during the month of May.

If you’re looking to sow your nemesia directly in the bed, wait for the end of April. Blooming, in this case, should occur in August or September.

How to plant nemesia

  • Planting nemesiaFor abundant flower-bearing, prefer a spot that is in part shade and never gets too hot.
  • Best is part sun. But you’ll be happy to see that nemesia still does flower well in the shade.
  • Nemesia prefers rather rich and well drained soil.
  • Water regularly, but not too much, after planting.

Also, best wait for April to transplant specimens purchased in nursery pots to the ground.

Growing nemesia in pots

Potted nemesiaNemesia is a flower that is perfectly suited to growing potted for your garden boxes and deck pots.

  • Opt for flower plant soil mix.
  • Ensure that the bottom of the pot has a hole in it.
  • Water when the surface of the substrate has dried up.

Pruning, and caring for nemesia

Cut wilted flowers off your nemesis as soon as they wilt, so that the plant won’t waste energy. This step isn’t mandatory but performing it will stimulate the plant to produce new flowers.

Apart from that, provide for regular watering for nemesia grown in in pots.

At the end of the blooming, once the leaves have withered away, cut back as short as you can.

When flowering slows and the stems look tired, shear the whole nemesia back by about half to trigger a fresh flush of buds.

Pinch the tips of young plants once or twice to keep them bushy.

Potted nemesia exhausts its compost quickly, so a liquid flowering-plant feed every fortnight keeps the display going.

Perennial nemesias are frost-tender, so shelter pots against a wall or under cover before hard frosts arrive.

Diseases and parasites that attack nemesia

Nemesia is vulnerable to powdery mildew.

  • Avoid wetting the leafage when watering.
  • Here, you can find the best practices to fight off powdery mildew.

As regards parasites, aphids is the most common predator, and it can wreck havoc among your plants.

Space nemesia plants far enough apart for air to move freely between the clumps, since crowded plantings with poor air circulation are where powdery mildew most often takes hold first.

Nemesia seedlings raised under cover are prone to damping off, so ventilate the frame and avoid keeping the compost soggy.

In waterlogged or heavy ground the roots rot quickly, which shows up as sudden wilting even though the soil is wet.

Learn more about nemesia

Nemesia flowerNative to South Africa, Nemesia is a very cute little flower that offers abundant blooming all summer long in a range of colors.

Nemesia is quite distinctive thanks to the wide range of colors, from white to red, including yellow. It is also found appealing for its delicate fragrance and its abundant flowering.

Nemesia actually bears so many flowers that at times the tiny colored flowers overtake and cover its leaves.

They’ll be perfect in flower beds, rocky settings or to mark edges, and they’ll also look amazing in pots and garden boxes on your deck or terrace.

Nemesia comes from the Greek root word nemesis, which stood for righteous anger. It was sometimes tied to the spirit of equilibrium, and also vengeance.

Here are the tips on how to grow this plant that expert Nemesia producer Stéphane Etienne prepared for us on the topic of Nemesia denticulata, the tooth-shaped nemesis:

Smart tip about nemesia

In summer, always favor watering in the evening to keep water from evaporating.

Frequently Asked Questions

What is the fragrance like on nemesia flowers?

Nemesia is appreciated for its delicate fragrance along with its abundant flowering. The flowers produce a subtle scent that adds to their appeal as ornamental plants.

How often should I water nemesia in pots versus in the ground?

For potted nemesia, water when the surface of the substrate has dried up. For ground-planted nemesia, water regularly but not too much after planting, and in summer, favor watering in the evening to prevent evaporation.

How much light does nemesia need to bloom?

Nemesia prefers part sun to part shade and does best in spots that never get too hot. However, nemesia still flowers well even in shade, making it a flexible option for various light conditions.

What are the most common pests and diseases affecting nemesia?

Nemesia is vulnerable to powdery mildew, which can be prevented by avoiding wetting the foliage when watering. Aphids are the most common pest predator and can cause significant damage to plants.

How do I prune nemesia to encourage more blooms?

Cut off wilted flowers as soon as they wilt to prevent the plant from wasting energy, which stimulates production of new flowers. At the end of the blooming season once leaves have withered, cut the plant back as short as possible.


Written by Gaspard Lorthiois | Loves helping out, especially when it comes to growing things. Worked in herbal medicine, runs a farm, and dabbles in tech. Master's degree and engineer.