September Calendar

Activities for September

• Fertilize lawn around Labor Day- if you only do it once this is the best time to do it.  Any later in Zone 3 and the grass doesn't have time to  take advantage of the food.  
• Fertilize Astillbes - these perennials are heavy feeders and I give them a little boost this time of year with a light fertilizer, usually 10-10-10 or less. 
• Stop fertilizing - Besides Astillbes, the lawn, and any annuals it is best to stop fertilizing.  Fertilizing would encourage new growth and instead you want the plants to start getting ready for winter by going dormant. 
• Deadhead perennials - this is a good time to deadhead those that are self-seeders that you don't want spreading.  Also be sure to deadhead phlox if you want them to stay true and not cross-fertilize with other types.   I leave the seed heads on most of my perennials as food for the birds during the winter and to create some winter interest.  
• Clean up the garden - the one place that I clear out is the vegetable garden to keep any diseases and pests from overwintering.  I leave my perennials standing during the winter.  One exception is that I cut down any perennials that have had a disease or pest problem.  There have been aphids on my Heliopsis  (common name:  False Sunflower) so those will get cut down to the grounds after they die back this year. 
• Bring in tender plants - for any plants that have spent the summer outside, I start to get them ready to bring inside.  First step is to move them to shadier spots to get them used to the lower inside light.  I then hose them down and treat with an insecticide soap to prevent them from bringing pests into the house.  They are then isolated in the garage for about a week to insure no pests.  
• Use the mower to chop leaves - As leaves begin to drop I use the mower to mulch them right back into the lawn.  Any leaves dropping on the perennial beds are left there until spring (when I use the mower again to mulch them right in the beds.)  For areas where the mower can't do the job, I use a mulching lawn vacuum and then dump the leaves in perennial or shrub beds that could use a bit more.  This minimizes hauling leaves around and puts them to good use right where they land.  
• Order fall planted bulbs - if not already done, this is a good time to order those spring bulbs and roots planted in the fall.  This includes tulips, daffodils, minor spring bulbs, garlic, rhubarb, peonies, lilies, foxtails, and many more.  All these can be planted when the ground temperature reaches 50 degrees or after the first good freeze (usually in October and as late as November.)