Mendel’s Gardens

Ferula communis

Giant Fennel

Family ApiaceaeGenus Ferula

This source reports two treatments. Both are shown.

Protocol 1

DerivedSER, INSR and RBG Kew, 2026

Difficulty Low Rated by us, not by the source.

Start around November 16, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 70 daysTemperature: 50°F 10°C Light: eitherMedium: 1% agar

    12 hours light, 12 dark.

about 2 months from start to sowing. Then 70 days to germinate.

100% germination in 70 days.

It germinates in the cold rather than after it. SID holds 20 such records.

Seed Information Database — SER, INSR and RBG Kew, 2026 · Germination records, ser-sid.orgCreative Commons Attribution — reused with credit
Show the original text
Ferula communis · 100% germination · sample size 23 · 1% agar · 12/12 light hours · 10°C · 70 days · France
Seed Information Database, Germination records, ser-sid.org. 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

DerivedSER, INSR and RBG Kew, 2026

Difficulty Low Rated by us, not by the source.

Start around March 8, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 14 daysTemperature: 59°F 15°C Light: eitherMedium: 1% agar

    8 hours light, 16 dark.

14 days from start to sowing. Then 14 days to germinate.

100% germination in 14 days.

Seed Information Database — SER, INSR and RBG Kew, 2026 · Germination records, ser-sid.orgCreative Commons Attribution — reused with credit
Show the original text
Ferula communis · 100% germination · sample size 20 · 1% agar · 8/16 light hours · 15°C · 14 days · Jordan
Seed Information Database, Germination records, ser-sid.org. 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.