What to do during September in your garden and greenhouse.

Your monthly gardening checklists

Flowers

Plant up pots for Autumn interest and colour.
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Summer prune apple and pear trees

Greenhouse

  • Plant prepared hyacinth bulbs in pots or hyacinth glasses, for fragrant indoor flowers at Christmas
  • Take down greenhouse shade netting or wash off shading paint by the end of the month, as light levels start to fall
  • Stay vigilant for pests and diseases in the greenhouse, and treat any you find immediately
  • Plant dwarf spring bulbs in pots, including irises, crocuses, chionodoxa and scilla, for early flowers
  • Pot up tender perennials, such as fuchsias and osteospermum, from summer displays and bring indoors before temperatures drop
  • Plant Anemone De Caen corms for a vibrant indoor display in early spring
  • Pay close attention to greenhouse ventilation, shutting vents on cool nights
  • Check greenhouse heaters are in good working order, and find out how to keep the heat in this winter
  • Maintain good plant hygiene, picking off faded blooms and dead leaves before fungal diseases can take hold
  • Look out for forecasts of early frosts and be ready to bring tender potted plants under cover
  • Move potted peaches and nectarines into a cool greenhouse or porch
How to grow hyacinths - problem solving
Pot up Hyacinths for fragrant indoor flowers.
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Fruit and veg

House plants

For more house plant advice and inspiration visit our Growing and caring for house plants page. Find out how to rescue house plants in this podcast episode.

Garden maintenance

Pick off and destroy any leaves with blackspot

Offers

Travel and events
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Swiss Alps & the Glacier Express

Travel by rail from London to Paris and on to Interlaken, in the heart of the Alps. From here, you’ll see the beauty of the Swiss Alps by train, including a ride on the Glacier Express. Take boat trips on Lakes Lucerne and Thun, ride a train to the summit of Mount Rigi and explore the Swiss capital, Bern.
From£1595

pp. 4 nights, departs 30 September 2025. Also available 2 February 2026. From prices are per person, based on two people sharing a standard room, subject to availability. Price and itinerary correct at time of print but may be subject to change. Single supplement applies. Deposit 30%. Local charges such as tourist tax may apply. One travel wallet per booking. Offers are not valid in conjunction with any other offers or promotions. Travel insurance is not included and should be taken out at time of booking. Images used may not reflect your actual tour experience. Holidays may be sold through other selected brands. Tours are operated by and subject to the booking conditions of TS Travel Limited (ATOL bonded).