Alberta's growing season is short and intense — roughly May through October — which means your lawn has to do a full year's growing in about six months. Fertilize at the wrong time and you waste money or, worse, stress the lawn. Here's the Alberta-specific timing.
Spring (late April to May): Apply your first feeding once the soil warms and the grass starts actively growing — usually late April to mid-May in Calgary. A spring feeding with a balanced, slow-release nitrogen fertilizer gives the lawn the energy it needs to green up and thicken after winter. Don't fertilize too early; frozen soil can't absorb nutrients and the feed washes away.
Early summer (June): A second, lighter application sustains growth through the long daylight hours of June. Use a balanced fertilizer, and water it in well. This is also the time to address weeds — a thick, well-fed lawn crowds them out naturally.
Late summer (August): The heat of July can stress Calgary lawns. A late-summer feeding helps the lawn recover and fill in thin spots before fall. This is also a good window for aeration if your clay soil has compacted over the summer.
Fall (September to October): The most important feeding of the year. A fall winterizer fertilizer, high in potassium, helps the lawn store energy and build root mass for winter survival. Apply in late September to early October, while the grass is still actively growing but before the ground freezes. This single application does more for next year's lawn than any other.
That's four applications — spring, early summer, late summer, and fall winterize — timed to Alberta's season. Skip one and your lawn shows it by midsummer. At Jayz Landscaping & Snow Removal, our fertilization program handles all four so you don't have to think about it.