Gardening is all about working with the seasons. The seasons are driven by the earth revolving around the sun and so our gardening calendar is a solar based calendar.
Based on our yearly progression around the sun there are four main solar milestone:
*  Longest day (summer solstice)            Mid Summer   – 21/22 Dec
*  Equal day/night (autumn equinox)     Mid Autumn    – 20       Mar
*  Shortest day (winter solstice)              Mid Winter      -20/21 Jun
*  Equal day/night (spring solstice)         Mid Spring      -22/23 Sep
We have traditionally celebrated these days with a BBQ in the gardens on the preceding Saturday.

For all of Australia the civil calendar makes the year into four equal length seasons of three months, a good approximation but not good enough for our gardening calendar:
Spring       01 Sep to 30 Nov  
* Basil, chives, coriander, dill, mint, oregano, parsley, sage, thyme.
* Beetroot, broccoli, cabbage, capsicum, carrot, cauliflower, celery, cucumber, eggplant, endive, leek, lettuce, onion, pak choi, pea, spinach, spring onion, strawberry, sweet corn, zucchini, tomato
Summer    01 Dec to 28/29 Feb
* Basil, chives, coriander, lemongrass, marjoram, mint, oregano, parsley, rosemary, tarragon, thyme.
* Beans, beetroot, cabbage, capsicum, carrot, cauliflower, cucumber, English spinach, kohlrabi, leek, lettuce, onion, parsnip, pumpkin, radish, silver beet, spring squash, swede, sweet corn, tomato, turnip, zucchini.
Autumn    01 Mar to 31 May
* Chives, coriander, garlic, lemongrass, marjoram, mint, oregano, parsley, rosemary, shallots, tarragon, thyme.
* Broad bean, beetroot, cabbage, carrot, cauliflower, Chinese broccoli, Chinese cabbage, English spinach, leek, lettuce, onion, parsnip, potatoes, silver beet, swede, turnip.
Winter     01 Jun to 31 Aug
* Chives, curry, dill, mint, parsley, sage and thyme.
* Artichoke, asparagus, beetroot, broad beans, broccoli, Brussels sprout, cabbage, carrot, cauliflower, celery, endive, leek, lettuce, onion, peas, snow peas, silver beet, spinach, radish.

Australia is often divided up into four or five climate zones and Goulburn is in the cool zone along with Bowral, Canberra and many other places. Obviously Goulburn is similar to other places in the zone but also different, so it makes sense for us to have our own planting and harvesting calendar based on weeks of the year so we can plant a few weeks earlier or later than Canberra to suit our local temperature and climate and get the most from our garden.

Shortly we will have our own Goulburn weekly based Planting and Harvesting calendar that you will be able to download here.