September marks a pivotal period for outdoor enthusiasts as summer transitions toward the colder season, presenting an opportunity to address essential garden maintenance and strategic planting.

Horticultural specialists Simon Parry from Trex and Craig Wilson of Gardeners Dream have outlined recommended tasks for this transitional month.

Lawn preparation becomes increasingly important as autumn approaches.

Wilson noted that heightened rainfall during September raises the risk of waterlogged turf.

He recommended aerating lawn areas using a garden fork or scarifying equipment to combat waterlogging and soil compaction.

Parry advised maintaining regular mowing routines during dry conditions, as cutting wet grass may harm root systems.

He explained that early September calls for mowing every one to two weeks with elevated blade settings to enable grass to absorb rainfall missed during summer.

As growth decelerates later in the month, fortnightly mowing proves sufficient.

Applying autumn lawn feed enriched with potassium and phosphorus strengthens root systems when growth appears weak.

For areas affected by summer damage, raking out deceased moss and spiking the surface prior to feeding promotes regeneration.

September also presents ideal conditions for establishing spring-flowering displays.

Wilson recommended planting bulbs such as daffodils and bluebells once autumn arrives.

He noted that installing shrubs and trees during this period allows root systems to establish before frost arrives, producing superior spring growth.

Parry supported this guidance, suggesting the sowing of hardy annuals and spring-flowering bulbs while soil temperatures remain elevated.

He noted that daffodils and hyacinths develop robust root systems during autumn months.

Vegetable and herb planting also merits attention.

Wilson advised cultivating hardy varieties including kale, pak-choi and mustard for winter harvest.

He also recommended potting herbs such as parsley, chives and coriander before temperatures decline, positioning them on sunny window ledges for continued fresh supplies.

Seed harvesting from existing flowers and plants supports future planting efforts.

Wilson explained that ripe seeds should be collected from preferred flowering specimens for spring sowing.

He advised storing seeds in envelopes within cool, dry locations and ensuring proper labelling.

Parry noted that fruits including apples, pears and plums reach optimal ripeness alongside vegetables such as tomatoes, courgettes, beans, onions and potatoes.

Removing decaying fruit prevents disease spread, while spent healthy plants contribute to compost piles and exhausted summer crops require removal.

Leaf mould creation offers long-term soil improvement benefits.

Parry recommended gathering fallen foliage and placing it in robust black plastic containers with drainage holes, allowing decomposition over one to two years for organic soil amendment.