Real World Gardener Perennial Lobelia is Plant of the Week

October 2nd, 2015

REAL WORLD GARDENER Wed. 5pm 2RRR 88.5fm Sydney, streaming live at  and Across Australia on the Community Radio Network.

Real World Gardener is funded by the Community Broadcasting Foundation (CBF).

The complete CRN edition of RWG is available on , just click on 2RRR to find this week’s edition.


Talking with the Plant Panel; Karen Smith editor of and Jeremy Critchley owner


Do you love blue flowers? If so you’ll love this next plant,

Lobelia usually sold as an attractive annual herb but there are new varieties that are biennial or even perennial.
Lobelia it’s an easy-to-grow, carefree plant that prefers cooler climates but grows all through the summertime.

Butterfly like blue flowers smother the plant for many months.

Flower colour is the brightest of brilliant blue.
It flowers so much it will be still going right through until the first frost. 
Did I mention that the flowers are really, really blue so let’s find out what it is…

Lobelia species are native to North America, South America and Southern Africa There are many selections of Lobelia erinus grown in gardens around the world and growing lobelia is an asset to the garden.
Lobelia erinus from which Lucia Dark Blue is bred and selected is South African in origin. 
'Lucia' Dark Blue


Location is the key to success with Lobelias.
They need a well draining garden bed or container in full sun to part shade for some of the day.
Keep the soils evenly moist and mulch to conserve moisture and keep the soil cooler.
Once plants are established a regular but diluted liquid feeding programme every two weeks or so is beneficial.
Insect pests and other diseases are not a serious problem.
A light prune when plants are beginning to look a bit sad together with an application of a balanced fertilizer will promote new growth and another crop of flowers.


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