From Old House Gardens - 'If daffodils were athletes, 'Avalanche' would be wearing an Olympic metal. Extra vigorous, with 15 to 20 fragrant blooms per stem. It was discovered thriving happily half-way down a rocky sea cliff in the Scilly Isles where tazettas had once been grown by the thousands in the fields above. Superb in zones 6b - 9b. It's also easy to force indoors for a refreshing bit of spring in winter. 8 W-Y. Holland grown'.

OHG web site details method of forcing in water with minimal cold period. Basically it's done by setting bulbs on pebbles, rocks, or marbles with water up to base of bulbs, enclose in paper bag, subject to a 3 week cold period, then set out to bloom. This method works. I've done it myself.

An interesting side note related to daffodil growers in the Scilly Isles off the coast of England: Growers must pay a tithe (tax) yearly to the King of England of 1 pound. One pound covers all the daffodil growers; there are a lot of daffodils still grown there.

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aka The Seventeen Sisters - name based on the high number of blooms per stem. RHS says 10, other sources quote 15 to 20, or 'cascades' of'.
Good for naturalizing. Good for US southern gardens. Sweetly scented. 1906 heirloom. Found growing precariously on a sea cliff in England's Scilly Islands
A good selection to force over winter; can be forced in water on pebbles or marbles (similar to its non-hardy Tazetta cousins the Paperwhites). Old House Gardens recommends using a deeper bowl than those used for paperwhites to allow greater root growth. These daffs need 2-3 weeks of below 50° but over freezing temps to promote root development before top growth commences. Keep cool for best blooming show.

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Brent and Becky's description - 'called 'Seventeen Sisters' in the past because of it's 15 - 20 white petaled and demitasse shaped cups, sweetly fragrant flowers, show flower and great in the garden; 1700; zone 6 - 9; 16 to 18"; early-mid spring; forces easily.'

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