About the plant What it is and where it grows — not part of any germination protocol.
Native range New Zealand Toxicity is noted only where a source states it. No note here is not a finding of safety.
Source: GBIF Backbone Taxonomy — Global Biodiversity Information Facility.
This source reports two treatments. Both are shown.
Protocol 1 N. C. Deno, 1993 Difficulty Low Rated by us, not by the source.
Start around March 15, 2027 for a May 3 last frost.
1 2 Sow and cover
Temperature: 70°F 21°C
No stated waiting before sowing. Then 21 days to germinate.
100% germination in 21 days.
GA-3 is a requirement, not an improvement. The samples were small, but nothing at all germinated without it and the seedlings were healthy. A preliminary three months at 40 made little difference.
Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Aciphylla p. 86Public domain Show the original text Aciphylla (Apiaceae). The three species studied require GA-3 for germination. With GA-3 at 70 germination was 3/3 in 3rd w for A. aurea, 2/3 in 3rd w for A. dobsonii, and 1/3 in 4th w for A. hectori. None germ. in the controls. A preliminary 3 m at 40 had little effect. Despite the small samples, the results are dramatic, and the seedlings were healthy. GA-3 treatment is strongly recommended for this difficult group. Seed Germination Theory and Practice, 2nd ed., Ch. 20, Aciphylla p. 86. Quoted exactly. Every value on this card comes from this record, except the difficulty rating, which is ours; the step names come from a fixed list. Protocol 2 N. C. Deno, 1993 1 Sow and cover
Temperature: 70°F 21°C
No stated waiting before sowing.
0% germination.
Nothing germinated without GA-3.
Seed Germination Theory and Practice, 2nd ed. — N. C. Deno, 1993 · Ch. 20, Aciphylla p. 86Public domain Show the original text Aciphylla (Apiaceae). The three species studied require GA-3 for germination. With GA-3 at 70 germination was 3/3 in 3rd w for A. aurea, 2/3 in 3rd w for A. dobsonii, and 1/3 in 4th w for A. hectori. None germ. in the controls. Seed Germination Theory and Practice, 2nd ed., Ch. 20, Aciphylla p. 86. Quoted exactly. Every value on this card comes from this record; the step names come from a fixed list. 
