Fresh asparagus is presently supplied to Australian markets from August to March from temperate regions. For the remainder of the year, there is no significant production of fresh spears in Australia.
Recent research in Taiwan, Zambia and Zimbabwe has indicated quality asparagus can be grown in tropical and subtropical regions. The harvest period can be manipulated by withholding irrigation water and cutting fems to make spears grow out-of-season.
Bonnardeaux, John and Robinson, Chris
"Export of asparagus from the Ord River,"
Journal of the Department of Agriculture, Western Australia, Series 4: Vol. 34
, Article 6.
Available at: http://researchlibrary.agric.wa.gov.au/journal_agriculture4/vol34/iss2/6