Now is the perfect time to deadhead your Buddleia (Butterfly bush) for a burst of flowering in September.
- If you just have just a few Buddleia, you can easily use hand shears to individually remove the spent flowers. This causes more flower buds to be produced just below the old blooms.
- If you have lots of Buddleia, you can use hedge shears to roughly shear off all the old flowers. It takes less time and produces the same result!
Now is also a great time to cut back the foliage of daylilies that have finished blooming.
- Shear them back to 2" - 4" from the ground to stimulate fresh new growth for late summer and fall.
- Shearing also stimulates reblooming in the reblooming daylilies such as 'Lemon Lollipop' and 'Yellow Lollipop'.
Neaten up your hosta by trimming off any older leaves that may be turning yellow or have sun-bleached edges.
Deadhead spent blooms of Phlox, Salvia, Scabiosa, Geranium, Echinacea, and other summer flowering perennials to encourage them to rebloom.
Cut older Petunia stems back by two-thirds and then fertilize the plants to encourage new growth and blooms.
Hot weather and high humidity encourages fungal diseases like powdery mildew.
- Cut down and remove foliage of affected plants that have finished blooming. This includes peonies as well as phlox and other perennials. Do not compost!
- Use Bonide Fung-onil, copper fungicide, or Immunox to treat plants that are still in bloom.
Remove dead, damaged, diseased, and insect-infested stems and foliage whenever you see them.
August is one of the best times to control white grubs in your lawn. These grubs are easiest to control now when they are small and actively feeding near the soil surface.
Here are some grub controls:
- Bayer Advanced Season-Long Grub Control
- Bonide Annual Grub Beater
Late August is a good time to begin your fall application of organic fertilizer. Feed with your lawn with Espoma Fall Winterizer Organic Lawn Food. Espoma's winter formula supplies long lasting nitrogen, an essential nutrient that helps to promote a thicker lawn and vigorous growth. It is also fortified with potassium, a nutrient that helps the lawn recover from summer drought conditions, enhances winter hardiness, and helps promote a better spring greening the following season.
Late August is a great time to begin transplanting established spring-flowering bulbs.
Use a garden fork to lift the clumps from the ground.
Replant the bulbs in fertilized soil in their new location. We highly recommend using Espoma Bulb-tone in the planting hole.
If your bearded iris have become overgrown and don't bloom well anymore or have stopped blooming all together, they probably need to be divided. August is a great time to do this!
Here's what you do:
- Lift the rhizomes from the ground with a digging fork.
- Cut the foliage back to 6" and clean off the soil so you can see the rhizomes.
- Break the rhizomes apart at the joints where they snap naturally in your hands.
- Discard the old, withered rhizomes. These sections will never produce foliage or flowers again.
- Cut away any damaged or rotten parts
- Dip divisions in 10% bleach solution for 3 minutes.
- Allow to dry and replant the divisions leaving the top of the rhizome exposed at the surface.
- Do not mulch.
Read more about dividing Tall Bearded Iris.