Real World Gardener Delphinium Gaurdians are Plant of the Week

November 8th, 2015

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

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1-DSC_2540.JPGDelphinium "Guardian"
 These mid-sized plants are the stars of the early summer border.

The plants form a low mound of deeply-cut green leaves, and have these amazing tall spikes of satiny flowers.

The original version have enormous  spikes of up to 2 1/2 metres and needed 'vernalisation."

But not D. Gaurdian which grows to around 1 metre tall with deep-blue petals and strong multi-branching stems that are great for cutting.


Let’s find out about them.

I'm talking with Karen Smith from and Jeremy Critchley owner of

Special Tips for Delphinium Plants
in the past, the 'old school' Delphiums required their roots to be kept cool, but not these new varieties because their foliage is quite large and as they're usually in the back of the flower border, or where the roots are shaded by other plants.

Removing faded spikes at the base will encourage repeat flowering spikes throughout Summer and into Autumn.

This new branching variety of Delphiums should flavour in your garden beds for at least several months.

When all flowering is finished, remove the last of the dead spikes and water them well after fertilising.

 They main thing you have to watch out for in hot, humid summer regions, is that plants are often attacked by mildew in mid-summer; to fix that just cut back the foliage quite hard to encourage fresh new growth.
In these regions plants don’t usually last more than 2 to 3 years. 
Once established, they have low water and maintenance requirements although they will shutdown on days when temperatures are over 30 degrees C in attempt to cool themselves.
 If you have any questions about growing Delphiniums of any variety why not write in to




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