Geranium himalayense Plenum (Birch Double)
Geranium himalayense Plenum (Birch Double)
Geranium himalayense Plenum (Birch Double)
Geranium himalayense Plenum (Birch Double)
Geranium himalayense Plenum (Birch Double)
Geranium himalayense Plenum (Birch Double)

Geranium himalayense 'Plenum' ('Birch Double')

Producing flowers upon flowers, offering a wonderful show for months on end!
  • Bring a real cottage garden feel to your borders with this lovely hardy perennial
  • Smothered in neat double-petalled blue flowers from late April to July - you may also get a second flush in autumn
  • Forms neat mounded plants approx. 30cm tall with attractive rounded leaves which turn a beautiful deep red in autumn
  • Likes full sun, easy to care for, and perfect in any herbaceous border or patio container
  • Delivered as a set of 3 x 9cm potted plants ready for immediate planting

Product options:

3 x 9cm Pots
Item: 560454
3 x 9cm Pots - Item: 560454
RRP £29.97
Save: £15.00 - 50%
*Despatched from
Late April
Key Points
Full Product Details

Product Information

A superb geranium for any border, 'Plenum' produces the most beautiful violet, double, ruffled flowers set on a backdrop of deep-green foliage - a real top perennial Geranium

What's really special about 'Plenum', also known as 'Birch's Double', is that the glossy green foliage almost magically changes colour in the autumn to a fiery orange-red - so not only do you get wonderful flowers from June, but foliage interest too.

It's low growing, reaching a height of about 30cm so is ideal for use as groundcover and also perfect for pots and containers in smaller spaces. It is easy to manage, tolerating most soils and with a hard cut back after a first flush of flowers in June and July, you'll likely get a second round well into autumn.

What Is Supplied

Item 560454 supplied as:
Supplied as a set of 3 established plants in 9cm pots ready to plant straight out.

Plant Care Information

Perfect In Pots
Perfect In Pots
Plant In Sunshine
Plant In Sunshine
Winter Hardy
Winter Hardy
Easy To Grow
Easy To Grow

Top Tips

Snip off faded flowers at the base or shear the tops of the plants back to new growth in order to stimulate reblooming and freshen the foliage.

Care Information

  • Prefers compost-enriched soil that stays moist. If planting straight out, keep well-watered until established.
  • Geraniums are herbaceous perennials and are easy to grow and fuss free. They need minimal maintenance and are also generally pest and disease resistant. Once established, they're drought tolerant and even slugs, snails and rabbits leave them alone!
  • Before planting, prepare the soil by digging over and removing any weeds. Incorporate some well-rotted manure to enrich the soil if necessary.
  • Knock the plant from its container. Look at the roots – if they are circling around the compost, it is best to tease them out. To do this, push your fingers into the root ball along the bottom edge and pull. Do this in a couple of places. This should encourage the roots to spread into the surrounding soil.
  • Next use a trowel or spade to create a hole just deep and wide enough to set in the root ball.
    The aim is to bury just the roots, leaving the bases of the stems (when in growth in summer) or the shoots (in spring) above ground.
  • Firm back around the soil, using your hand for small clumps and your heel on larger areas.
  • Water in well to settle the soil and prevent desiccation.
  • Doesn’t normally need dividing but plants can be split in spring or autumn if needed.
  • A haircut with shears after flowering is all the pruning that is required.

Planting/Flowering Calendar

Planting Time
Flowering Time

Fully Grown Plant Dimensions (approx)

Plant Dimensions
30 cm
50 cm
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1. If you're not totally happy with your order, return it within 30 days and we'll replace or refund in full!
2. Should any hardy plant fail to thrive thereafter, we'll replace free of charge - you just pay the P&P
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