Ask an Expert – Checklist for September Yard and Garden Tasks

August 31, 2021
September leaves

Fall is in the air, which may make you want to hang up the rake. Don’t give up just yet, though – we’re coming in the home stretch! Consider these fall tips from the USU Extension Gardeners Almanac. Also included are links for further information.

  • Click here if you are interested in saving seeds.
  • Learn about how and when to harvest watermelon and cantaloupe.
  • For storing potatoes, harvest the tubers once the vines have died down.
  • Harvest garlic and onions once the tops have dried down. Allow them to dry for 2-3 weeks before storing.
  • Store potatoes, garlic and onions in a cool/dry location (32-40 F) away from apples.
  • Fall is the perfect time of year for planting trees and shrubs.
  • Go hiking in the hills to enjoy autumn colors.
  • Divide crowded, spring-blooming perennials.
  • Check pears for ripeness once the fruit twists easily off the tree and seeds are dark colored, allowing them to finish ripening off the tree.
  • Early in September, apply a slow-release lawn fertilizer to provide a long-lasting effect throughout the fall months.
  • As temperatures cool, turfgrass requires minimal irrigation each week. Click here for irrigation needs in your area.
  • Plant new lawns or repair insect/diseased areas with grass seed, allowing 4-6 weeks for establishment before heavy frosts.
  • In compacted sites, aerate with hollow core aerator when turfgrass is actively growing in September and October

Pests and Problems:

  • To control raspberry crown borer, use a root drench during late summer to early fall. Click here for more information.
  • Learn about what causes bitter pit and other problems in apples.
  • Control rust mites in apple and pear trees after fruit is harvested and before leaf drop. Click here for information.
  • Box Elder bugs congregate on sunny surfaces during the fall months. Click here to learn about controlling these nuisance pests.
  • Monitor for damaging turfgrass insects.