Pelargonium 'Dark Secret'

The darkest, richest, blackest pelargonium without any paler shading. I love the colour of the flowers against the vibrancy of its sharp green leaves. More
1 young plant 190104-1 £10.50

Sorry, this item is currently unavailable

Currently unavailable
Get notified when it's back!Close this
3 young plants 190104-3 £28.95

Sorry, this item is currently unavailable

Currently unavailable
Get notified when it's back!Close this
More Details

The darkest, richest blackest pelargonium without any paler shading. I love the colour of the flowers against the vibrancy of its sharp green leaves.

Our pelargoniums:

  • come with full planting instructions, great for beginners
  • are ready to pot on and plant out as soon as the frosts are over in your area, or have them indoors to cheer up a sunny windowsill

Genus Pelargonium
Group/Species Regal

Excellent for amateur gardeners as they require only frost free conditions in winter. Some of the earliest to flower in the spring and will flower all summer either as a pot plant inside or in a summer garden display. Click here for more information about pelargonium groups.

Variety Dark Secret
Type Tender Perennial
Border Position Container Garden
Soil Type Broad Tolerance
Scent Unscented
Site Full Sun
Moisture Well-drained
Height 30cm (12in)
Spacing 45cm (18in)
Sowing, Seeds, Planting Protect plants from frost in a sheltered environment whilst you pot them on ready to go outside, usually around May time. A greenhouse is perfect but a windowsill or conservatory will do fine (16-18°C is ideal), with plenty of sunlight. Gradually acclimatise plants to outdoor conditions for 7-10 days before moving to their final position. If growing in containers incorporate a slow-release fertiliser into the potting mix.
Care Tips Water plants well in summer and deadhead to encourage a second flush of flowers. Apply a home-made feed of comfrey juice, or organic liquid plant food (both rich in potash), every fortnight. Lift the plants with care and pot them up inside before the frost, cutting the top growth back by one third as you do so. They don’t go into complete dormancy, so water lightly through the winter. In spring begin feeding and increase watering. Plant out only once any danger of frost has passed. Please be aware that contact with the foliage may occasionally aggravate skin allergies.
Flowering June - November
Vase Life These will look good for up to 3 weeks.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • Sow Under Cover/Plant Indoors
  • Direct Sow/Plant Outdoors
  • Flowers/Harvest
Advice & Videos
How to take pelargonium cuttings

Sarah Raven shows you how to take pelargonium cuttings, and multiply 1 plant into 20.

Mini pelargonium, blackberry and apple pies recipe

Pelargonium leaves make an excellent addition to a classic apple and blackberry pie. Make one big pie, or miniature versions in ramekins.

Understanding Pelargonium groups

This brief guide explains the different groups of pelargoniums that are available and their distinct character traits.

How to plant and grow pelargoniums

Learn how to grow and care for your pelargoniums.

Pelargonium-scented strawberry jam recipe

This strawberry jam is scented with pelargonium leaves, which adds a delicious, unique flavour.

Choosing pelargoniums

Find out about which varieties of pelargoniums to choose, and why.

Planting a pelargonium pot display

Create the perfect summer and autumn pot display with rich coloured pelargoniums and verbena by following this easy tutorial.


Plant Delivery - When in stock, please allow up to 3-4 weeks for despatch. For fruit & veg bare roots/crowns, please allow up to 2 weeks for despatch.

Click here to find out more information about our delivery rates and times.

Pelargonium 'Dark Secret' reviews

* * * * * Average based on 6 reviews

* * * * *

Reviewed 31st July 2019 by Fiona

* * * * *

Reviewed 31st July 2019 by Clare

Healthy plants and well packaged

* * * * *

Reviewed 31st July 2019 by Lorna

Lovely colour, growing well.

* * * * *

Reviewed 31st July 2019 by Lesley

Beautiful! It keeps flowering in my conservatory and has grown into a nice healthy plant

* - - - -

Reviewed 19th September 2018 by Christine

The plants were not as promised. They grew nicely and bushy, however, not many blooms at all. Leaves very sticky and little white insects on them. They did not come from my own traditional Geraniums, and they do not go onto my other plants thank goodness. They were very expensive, so am reluctant to clear them out. Will ask "Sarah" for advice.

Reply from the Sarah Raven Team:

"Thank you for your review. In our experience pelargoniums ideally need at least six hours of sunlight per day to help store enough energy to bloom. Without enough light, they will of course still grow, but it's unlikely they will flower strongly so if possible move your plants to the sunniest spot available. Another factor that can affect pelargoniums is watering , too much moisture can also affect their performance so ensure that your pelargoniums are in pots with adequate drainage, and don't water the plants unless the top layer of soil feels dry. you can of course over winter them and they will then be bigger to start off with next year and should start flowering much sooner."

Posted 7th November 2018

* * * * *

Reviewed 3rd September 2018 by Ms Maynard

excellent service.Has flowered and flowered and is still flowering