Saturday, 30 November 2019

Pruning 101: Deciduous vs Evergreen and Sea Urchin Hakea

We start with part three of a new series “pruning 101” with landscape designer Jason Cornish, in Design elements and a fabulous pom pom flowers in plant of the week.
  • Pruning 101: Deciduous vs Evergreen.
Deciduous and evergreen plants have different pruning needs.
Have you ever had a shrub, say philadelphus that you thought wasn’t performing-no flowers for several years, so you transplanted it or pulled it out?
Perhaps you weren’t timing it right?
Philadelphus coronarius
I'm talking with Jason Cornish from
Let’s find out.

Marianne's Tips on Pruning
Pruning group
Pruning method
Time of pruning
Examples of plants
Flower on current season’s growth
Old wood thing. New growth shortened.
Winter/early spring
Roses, abelia, buddleia. Hibiscus rosa-sinensis
Flowers on previous season’s growth
Immediately after flowering
Spiraea, Rondeletia,Prunus glandulosa, Acacia, Callistemon, Grevillea
Flowering on older wood and spurs
Maintain tidy shape
After flowering
Prunus cerasifera & other prunus species
For showy fruits
Cut away most of leaders
 After fruiting if needed
Cotoneaster, pyracantha, Berberis spp.
For showy foliage
Prune 50% of growth’ feed and water
Winter to spring
Abutilon, Aucuba japonica-gold dust plant. Buxus.  Hebe, Euonymus.
Non flowering evergreen
Do not prune back beyond green foliage into older wood
Late winter

If you don’t know what shrub or tree that you’ve got, the best advice is to wait until it flowers or sets fruit, and then prune after that.
  • In the case of philadelphus, as soon as the shrub had finished flowering, cut out all of the stems which have just flowered.
  • Prune them back to around a third of their length. They will soon start to produce new stems which will provide the flowering stems for next year. Don’t just prune little bits off the end 
If you have any questions for me or for Jason, please write in to


Hakea petiolaris; Sea Urchin  Hakea
There are many reasons to like a particular plant which affects our choices.
For some it’s the flowers or the perfume, for others it’s the colour of the leaves.
But for something completely different, others like a plant because of the sound the wind makes through the leaves of that particular plant.
Hakea petiolaris flower
So what will appeal with this plant?
I'm talking with Adrian O’Malley, horticulturist and native plant expert.
Let’s find out.

For grey leaves, and spectacular flowers, the hakea is something to think about if you want a native small tree.
Medium tree 5 to 11 m high. Leaves are pale grey, broadly  obovate in shape and range from 5-15cm long by 2.3-6cm wide. 
Endemic to the south west of Australia, occurring at the coastal plain, jarrah forest and wheatbelt regions, often at the ancient granite outcrops of Western Australia. 

The only thing to watch for is high humidity can make them short lived.
Still, if you collect the seeds, then grow some more from seed and you’ll have another tree quite quickly.

If you have any questions for me or for Adrian, please contact us or write in.

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