Deno’s GardenMy Garden

Viola adunca

Blue Violet · Rocky Mountain Violet · Daisy-leaved Violet · Hookedspur Violet

Family ViolaceaeGenus Viola

A rain-beaded violet flower with darker veins running into a white throat, on a curved stem above a round leaf.
FlowerThegreenjCC BY-SA 3.0

About the plant

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

Habit
perennialPlants of the World Online
Habit
Perennial, Forb/herbPLANTS Database
Flower
Violet, lavender-violetFlora of North America
Native range
Alaska, Canada, lower 48 statesPLANTS Database

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; PLANTS Database — USDA NRCS; Flora of North America — Flora of North America Editorial Committee.

Worth knowing

This source reports 5 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1996

Difficulty Low Rated by us, not by the source.

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

  1. Gibberellic acid soak

  2. Sow and cover

    Temperature: 70°F 21°C

No stated waiting before sowing. Then 49 days to germinate.

78% germination in 7–49 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Viola p. 86Public domain
Show the original text
Viola (Violaceae). Four species of rosulate Violas from the Andes germ. only in 40 GA-3 (2nd Ed.). A most important new result is that all four samples germ. identically after fours years of DS. This shows that these have considerable longevity in DS in contrast to species native to Eastern U. V. adunca germ. 70 GA-3(78% in 1-7 w), 70L(64% in 7th d), 70D(15% in 3rd w), 40(12%)-70D(66% on 2nd d), and 64% in April-June in OT.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Viola 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

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

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

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    12 germinated in this phase.

  2. Warm moist stratification

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

about 3 months from start to step 2. Germination happens during step 2, in 2 days.

66% germination in 2 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Viola p. 86Public domain
Show the original text
Viola (Violaceae). Four species of rosulate Violas from the Andes germ. only in 40 GA-3 (2nd Ed.). A most important new result is that all four samples germ. identically after fours years of DS. This shows that these have considerable longevity in DS in contrast to species native to Eastern U. V. adunca germ. 70 GA-3(78% in 1-7 w), 70L(64% in 7th d), 70D(15% in 3rd w), 40(12%)-70D(66% on 2nd d), and 64% in April-June in OT.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Viola 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 3

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

Start around March 29, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 7 days to germinate.

64% germination in 7 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Viola p. 86Public domain
Show the original text
Viola (Violaceae). Four species of rosulate Violas from the Andes germ. only in 40 GA-3 (2nd Ed.). A most important new result is that all four samples germ. identically after fours years of DS. This shows that these have considerable longevity in DS in contrast to species native to Eastern U. V. adunca germ. 70 GA-3(78% in 1-7 w), 70L(64% in 7th d), 70D(15% in 3rd w), 40(12%)-70D(66% on 2nd d), and 64% in April-June in OT.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Viola 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 4

DerivedN. C. Deno, 1996

Difficulty Moderate Rated by us, not by the source.

  1. Sow outdoors and leave it

    Up in April-June.

No stated waiting before sowing.

64% germination.

This source doesn't state how long step 1 lasts.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Viola p. 86Public domain
Show the original text
Viola (Violaceae). Four species of rosulate Violas from the Andes germ. only in 40 GA-3 (2nd Ed.). A most important new result is that all four samples germ. identically after fours years of DS. This shows that these have considerable longevity in DS in contrast to species native to Eastern U. V. adunca germ. 70 GA-3(78% in 1-7 w), 70L(64% in 7th d), 70D(15% in 3rd w), 40(12%)-70D(66% on 2nd d), and 64% in April-June in OT.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Viola 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 5

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.

15% germination in 21 days.

Seed Germination Theory and Practice, 1st Supplement — N. C. Deno, 1996 · 1st Supplement, Viola p. 86Public domain
Show the original text
Viola (Violaceae). Four species of rosulate Violas from the Andes germ. only in 40 GA-3 (2nd Ed.). A most important new result is that all four samples germ. identically after fours years of DS. This shows that these have considerable longevity in DS in contrast to species native to Eastern U. V. adunca germ. 70 GA-3(78% in 1-7 w), 70L(64% in 7th d), 70D(15% in 3rd w), 40(12%)-70D(66% on 2nd d), and 64% in April-June in OT.
Seed Germination Theory and Practice, 1st Supplement, 1st Supplement, Viola 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.

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

Add to My Garden

View species page