G'day Jim, The conventional method of propagating asparagus's is to lift and divide clumps when dormant. A strong garden fork, a small axe, lots of bandaids and several beers. They are very tough plants, quite hard to kill, especially when they naturalise, and are traditionally sold as 'bare-root' crowns. They love a neglected garden, and can make an area unpassable when 'let go'. So I don't think you will have any problems, be they dormant or not. Start potting up some crowns now so they can get established. I understand that it can take up to three years to get new plantings up to proper production and good stem thickness. If you have an unusually good variety or a recognised cultivar, you might be able to get a local nurseryman to do all the work in exchange for as many crowns as you need. You may be surprised how many 'splits' they can get from a single established plant.
100 crowns? You must have a bit of space to play with then, lucky bastard ;-)
China Wingham NSW
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