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All, Spring

Growing Roses

August 31, 2021


Growing Roses

To determine what kind of rose will serve you best; consider flower shapes, sizes, colours, fragrance and how much maintenance it will require.

  • Blooms all summer
  • Minimal care other than watering and fertilizing
  • Adapt well to containers
  • Can overwinter when protected
  • High success rate as they aren’t grafted
  • Great disease resistance
  • Shorter and bushier than hybrid tea roses
  • Single or double flowers appear in clusters on a single stem
  • One perfect flower at the end of a single stem
  • The blooms are not as plentiful as the Floribunda but they are larger
  • Produces a large flower but occur in clusters like a Floribunda
  • Very fragrant.
  • Many different flower forms and sizes with modern roses (repeat bloom).
  • Important for their shrub habit that allows them to be planted in perennial and mixed borders.
  • Fast growing.
  • They will add vertical height on a trellis or they can climb over an arbour, pergola, or fence.
  • Bushy, flowering shrubs
  • Range in height from 50 cm – 250 cm.
  • Developed for hardiness, dense growth, and low maintenance.
  • Choose a sunny location which allows for 6-8 hours of direct sunlight per day away from tree roots with good air circulation.
  • Prepare a soil mixture of 1/3 Parkwood® 3 in 1 Planting Mix, 1/3 peat moss, 1/3 manure, and 150 ml (10 tablespoons) of bone meal per plant. Place some of this mixture in the bottom of the hole. If your rose comes in a plastic pot, water and gently ease it out and position it in the hole so that the graft or bud union (the swelling just above the roots) is even with the final soil level. If there is no bud union, ie. Shrub Roses which are now grown on their own roots; make sure that the root ball is above grade to allow for some initial settling of the soil.
  • Backfill the sides with more of the prepared soil mixture and firm into place.
  • Spread 125 ml (1/2 cup) of granular Supergreen Rose Food 6-12-7 or Bonemeal around each rose bush about mid-April after you’ve removed its winter protection.
  • Repeat this application after the first flush early in June and then again in August.
  • You can also fertilize every three weeks with Parkwood® Flower Food 15-30-15 water soluble fertilizer. Do not fertilize again after mid-August.
  • Roses generally need to be watered twice a week deeply in summer. This means a good soaking of the area.
  • Since foliage is sometimes prone to Black Spot and Powdery Mildew, try to keep the leaves as dry as possible.
  • Water with a watering can or watering wand rather than an overhead sprinkler.
  • Water only in the morning to prevent the likelihood of black spot and powdery mildew.
  • Watch for aphids which are small, soft-bodied insects that can be bright green, brown, red, or black. They usually cluster around the new growing shoots or on young flower buds.
  • Spider mites are tiny and suck sap from the underside of leaves. Look for flecked foliage that turns yellow and drops off. Insecticidal soap is the easiest, most environmentally friendly solution to these problems.
  • Black Spot looks exactly like its name while Powdery Mildew is a white, powder-like covering of the leaves and stems. Try to grow roses that are labelled “disease-resistant” to minimize the occurrence of these two conditions. If this happens, it has to be treated, or your rose bush will defoliate and be weakened in the process.
  • Sulphur Dust, Lime Sulphur and Safer’s Defender are three excellent organic fungicides. Start using one in early July, before you see any signs of disease, and continue every two weeks until late September. Safer’s End-All is an organic insecticide that can be used to control most insect pests. Dormant Spray can also be applied in March/Early April.
  • Safers 3 in 1 spray can be used if both insect and fungal problems are present on the rose bush.
  • For Floribunda, Hybrid Tea, Grandiflora, and David Austin roses, prune out all dead wood (brown twigs and end of branches) in early spring (before leaves are fully expanded).
  • Prune healthy wood (green in colour) back to 30 cm -60 cm (12” – 24”) above ground, or higher if not winter killed, just above an outward facing bud.
  • Climbing and Shrub Roses should only have dead wood pruned out. Do not cut out much healthy wood as this will interfere with flowering. Limit climbers to 3-5 strong canes and prune out the rest right down to ground level.
  • When roses start their blooming cycle, remember that removing spent flowers (called “deadheading”) promotes more flowers. Cut back the finished flower stems to just above the first leaf with five leaflets.
  • Always remove injured canes or sucker growth from the bud union as soon as you see it.