Deno’s Garden

Sphaeralcea incana

Genus Sphaeralcea

This source reports 5 treatments. All are shown.

Protocol 1

DerivedN. C. Deno, 1998

Difficulty Low Rated by us, not by the source.

Start around February 22, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: light

No stated waiting before sowing. Then 42 days to germinate.

100% germination in 2–42 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Sphaeralcea p. 62Public domain
Show the original text
Sphaeralcea (Malvaceae). S. incana data is now complete. Seeds germ. 70L(100% in 2 d-6 w), 70D(50% in 2-14 d), and 40(8%)-70D(15% in 2nd w). After 1 y DS the seeds germ. 70L(27% on 6th d) and 70D(10% on 7th d) showing significant dying.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Sphaeralcea p. 62. 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, 1998

Difficulty Moderate Rated by us, not by the source.

Start around March 22, 2027 for a May 3 last frost.

  1. Sow and cover

    Temperature: 70°F 21°C Light: dark

No stated waiting before sowing. Then 14 days to germinate.

50% germination in 2–14 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Sphaeralcea p. 62Public domain
Show the original text
Sphaeralcea (Malvaceae). S. incana data is now complete. Seeds germ. 70L(100% in 2 d-6 w), 70D(50% in 2-14 d), and 40(8%)-70D(15% in 2nd w). After 1 y DS the seeds germ. 70L(27% on 6th d) and 70D(10% on 7th d) showing significant dying.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Sphaeralcea p. 62. 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, 1998

Difficulty High Rated by us, not by the source.

Start around March 31, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 30, 2026.

  1. Dry storage

    Duration: 365 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: light

about 12 months from start to sowing. Then 6 days to germinate.

27% germination in 6 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Sphaeralcea p. 62Public domain
Show the original text
Sphaeralcea (Malvaceae). S. incana data is now complete. Seeds germ. 70L(100% in 2 d-6 w), 70D(50% in 2-14 d), and 40(8%)-70D(15% in 2nd w). After 1 y DS the seeds germ. 70L(27% on 6th d) and 70D(10% on 7th d) showing significant dying.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Sphaeralcea p. 62. 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, 1998

Difficulty High Rated by us, not by the source.

Start around September 23, 2026 for a May 3 last frost.

  1. Cold moist stratification

    Duration: 90 daysTemperature: 40°F 4°C

    8 germinated in this phase.

  2. Warm moist stratification

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

about 6 months from start to sowing. Then 14 days to germinate.

15% germination in 14 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Sphaeralcea p. 62Public domain
Show the original text
Sphaeralcea (Malvaceae). S. incana data is now complete. Seeds germ. 70L(100% in 2 d-6 w), 70D(50% in 2-14 d), and 40(8%)-70D(15% in 2nd w). After 1 y DS the seeds germ. 70L(27% on 6th d) and 70D(10% on 7th d) showing significant dying.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Sphaeralcea p. 62. 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, 1998

Difficulty High Rated by us, not by the source.

Start around March 30, 2027 for a May 3 last frost. Too late for spring 2027 — that needed starting on March 29, 2026.

  1. Dry storage

    Duration: 365 daysTemperature: 70°F 21°C

  2. Sow and cover

    Temperature: 70°F 21°C Light: dark

about 12 months from start to sowing. Then 7 days to germinate.

10% germination in 7 days.

Seed Germination Theory and Practice, 2nd Supplement — N. C. Deno, 1998 · 2nd Supplement, Sphaeralcea p. 62Public domain
Show the original text
Sphaeralcea (Malvaceae). S. incana data is now complete. Seeds germ. 70L(100% in 2 d-6 w), 70D(50% in 2-14 d), and 40(8%)-70D(15% in 2nd w). After 1 y DS the seeds germ. 70L(27% on 6th d) and 70D(10% on 7th d) showing significant dying.
Seed Germination Theory and Practice, 2nd Supplement, 2nd Supplement, Sphaeralcea p. 62. 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.