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Moltkia petraea

Balkan Borage

Family BoraginaceaeGenus Moltkia

Clusters of blue-violet tubular flowers with pink tips and protruding stamens, nodding from leafy stems.
FlowerGhislain118 (AD) http://www.fleurs-des-montagnes.netCC BY-SA 3.0

About the plant

What it is and where it grows — not part of any germination protocol.

Habit
subshrubPlants of the World Online
Flower
Blue-violetRead from the photograph on this page
Native range
Albania, Greece, NW. Balkan Pen.GBIF Backbone Taxonomy

Toxicity is noted only where a source states it. No note here is not a finding of safety.

Sources: Plants of the World Online — Royal Botanic Gardens, Kew; Read from the photograph on this page — Deno's Garden; GBIF Backbone Taxonomy — Global Biodiversity Information Facility.

This source reports three treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Sow around February 2027 — a date the source gives, not one counted back from a May 3 last frost.

  1. Sow outdoors and leave it

    Sown outdoors in February; up in April.

No stated waiting before sowing. Then 60 days to germinate.

40% germination in 60 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Moltkia p. 59Public domain
Show the original text
Moltkia (Boraginaceae). M. petraea germ. 70D(17% in 3rd w), 40(35% in 10th w)-70D(30% in 3-12 d), and OT{40% in April from seeds placed outdoors in Feb) Light or GA-3 had no significant effect. Moluccella (Lamiaceae),
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Moltkia p. 59. 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

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Start around January 25, 2027 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C Light: either

  2. Warm moist stratification

    Duration: 90 daysTemperature: 70°F 21°C Light: dark

    30 germinated in this phase.

Steps after step 1 run on after germination.

Germination happens during step 1, in 70 days.

35% germination in 70 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Moltkia p. 59Public domain
Show the original text
Moltkia (Boraginaceae). M. petraea germ. 70D(17% in 3rd w), 40(35% in 10th w)-70D(30% in 3-12 d), and OT{40% in April from seeds placed outdoors in Feb) Light or GA-3 had no significant effect. Moluccella (Lamiaceae),
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Moltkia p. 59. 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 3

DerivedN. C. Deno, 1996

Difficulty High Rated by us, not by the source.

Start around March 15, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 21 days to germinate.

17% germination in 21 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Moltkia p. 59Public domain
Show the original text
Moltkia (Boraginaceae). M. petraea germ. 70D(17% in 3rd w), 40(35% in 10th w)-70D(30% in 3-12 d), and OT{40% in April from seeds placed outdoors in Feb) Light or GA-3 had no significant effect. Moluccella (Lamiaceae),
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Moltkia p. 59. 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.

How each step is done, in Deno’s words, and what Verified and Derived mean.

Germination trials

Readers’ own records of sowing this species, published after review. Share your trial · All trials

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