Fall Gardening: Moving Perennials and Planting Trees in the Fall

At this time of the year, I get asked everyday if this is still a good time to plant.

The fact is that for many plants fall it is actually THE BEST time to plant! It's also a great time to get deals on perennials, trees, and shrubs too!

Why is it the best time to plant? Well, with plants preparing for winter, there is no energy being used for new growth. Soon leaves will start to drop and the sap stream will stop. All the plant's energy will go to root development and the soil is still warm enough for plants to settle in.

That said, plants that you buy in a garden centre will probably be "root-bound" after growing in a pot for a whole season.  For this reason, it is really important to break up that rootball at planting time, to give the plant a chance to develop new roots. Massaging the rootball lightly will likely not be enough. If necessary, take a knife to loosen the roots and really roughen them up. Make sure you have watered the plant before you do this.

  • Fall is also a good time to plant, move, or split most perennials.You can still see what is growing where and it is easy to remember what was not working well.
  • Most perennials can be split and re-located in fall or spring, but for Peonies, Bearded Irises, and Lilies, fall is the very best time.
  • Tender perennials and grasses are better relocated in spring. Shrubs and most evergreens can be re-located till mid-October.
  • I would not plant or relocate cedars any later than the end of September. 
  • All other trees can be planted or transplanted for as long as the ground is soft.
  • If you have any hardy perennials or shrubs in a pot or planter that you would like to survive winter, then this is the time to plant them in the ground. In our harsh Alberta winters plants will almost never survive in a pot.

When transplanting, mix in some Sea Soil into the new hole that you've dug.Sea Soil is our best compost here at Hole’s. It is made from composted forest fibres and composted fish. It works well for just about any plant and I love the smell of it that reminds me of forest in fall.

Finally, remember to water your plants during fall and soak everything really well before the ground freezes, usually towards the end of October.

 
~Maria Beers
 

 

Maria is a landscape designer trained and educated in the Netherlands. She owned a landscape design business for 10 years before moving to Edmonton in 2005 and joining the Hole's team. Interested in booking a landscape consultation with Maria? Click here.