SEPTEMBER GARDEN CALENDAR

CandideZA
Published on August 31st 2020
68
A close up of a flower
The season of new growth, vibrant blossoms and sweet scents has finally arrived. There are lots to enjoy in the garden this month. Spring annuals and bulbs are at their best, flowering plums and peaches burst into bloom, deciduous trees are budding, and the sounds of chirpy birds and active pollinators are restored to the garden after winter's silence.
There is much to do in the garden this month, especially in preparation for summer. So, grab your hat and gloves, we’ve got work to do!
Garden tasks to tackle this month:

MUST dos in the garden this month

  • First things first, adjust watering as the day temperatures increase, always abiding by water restrictions.
  • Spike compacted lawns to aerate them and apply a thin layer of lawn dressing to improve soil condition and encourage growth. Also, apply the first high nitrogen feed of the season (3:2:1 or 7:1:3).
Tip | Learn more about spring lawn care in the article below.
  • Now is the time to plant summer-flowering bulbs like Amaryllis, Dahlia, Dietes, Crocosmia, Eucomis, Gladioli, Gloriosa lily and Zantedeschia. Plant in well-prepared beds and remember to feed after flowering.
  • Clivias are synonymous with September. If you’re missing out on their beautiful bursts of colour - now is the time to plant them! Plant in dappled shade and well-draining soil.
Clivia flower
Tip | Growing clivias from seed or just want to learn more? Tap the articles below!
  • Now is the perfect time to take softwood cuttings from the tender new growth.
Tip | Not sure how to take softwood cuttings? Dig into the easy how-to guide below to learn how.

General tasks

  • Prepare beds for summer planting. Incorporate compost, a dusting of hoof, horn and bone meal, and dig in a handful of fertiliser (2:3:2) for each square meter.
  • The garden will benefit from an application of general fertilizer to maintain strong spring growth. Water thoroughly and spread compost under trees, shrubs and climbers as a mulch.
Tip | Read more about general fertilising and NPK in the article below.
  • Warmer weather also welcomes weeds, so make sure that you get on top of weeding early in the season.
A close up of a flower garden
A group of daisy flower on a plant
A close up of a flower
  • Feed Hydrangeas with a general fertilizer and a solution of iron chelate. Water well.
  • Divide and transplant ornamental grasses and crowded perennials that have finished flowering.
  • Cut back, mulch and feed ground-covers that have become untidy.
  • Boost Cymbidium orchids with a fertiliser high in nitrogen to boost leaf growth.
  • Clean out water features and divide and replant aquatic plants if necessary.
A close up of a pond

Rose care

  • Fertilize rose bushes with a balanced rose fertilizer, Epsom salts and increase watering.
  • Add a good layer of mulch around roses.
  • Pinch prune Hybrid Tea roses to encourage new basal growth and root development.
A vase of flowers on a tree branch

Food garden

A hand holding a small salad
  • When the danger of frost has passed, sow or plant chillies, sweet peppers, cucurbits, tomatoes, brinjals and maize.
  • Water seedlings daily and feed with an organic fertilizer every fortnight.
  • Now is the time to plant seed potatoes and sweet potatoes in well-prepared beds.
  • There is still time to get asparagus crowns in the ground. Soil preparation is key!
  • Ensure citrus trees that are in blossom are well watered.
A close up of a flower
A close up of a flower

Indoor plant care

  • Reduce the amount of water given to Cyclamens.
Tip | Dig into the article below to learn more about the growing cycle of Cyclamens and how to take care of these stunning flowering plants.

Pest Patrol

Along with the increase in temperatures comes the increase in pests and disease so stay on top of pest patrol this month.
  • Inspect roses for aphids, thrips, bollworm and powdery mildew.
  • Keep an eye on Clivias and other lilies, like Amaryllis and Agapanthus for the deadly lily borer.
  • Protect fruit trees from the fruit fly and codling moth by starting spray treatment when at least three-quarters of the petals have dropped.
  • Put bait out for cutworm, slugs and snails.
Tip | Read more about controlling slugs and snails in you garden.
  • Leafcurl on peaches.
  • Citrus psylla on lemons.

In flower this month

Annuals
Perennials
Bulbs
Climbers
Shrubs
Trees
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