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Spiraea douglasii ssp menziesii


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Spiraea douglasii ssp menziesii

Elements of Structural and Systematic Botany

B and T World Seeds' Botanical Glossary

B and T World Seeds' reference number: 436411

The average, annual, minimum temperature zone where Spiraea douglasii ssp menziesii is cold hardy
USDA Zone:5 -20° to -10°F   (-29° to -23.5°C)
Type of plant - deciduous shrub
Flower or inflorescence: deep PINK in erect conical pan.-15c
Foliage: -10cm.oblong,serr,glab-lanuginose
Height, in meters: 1
Height, in feet: 3.30
Spiraea douglasii ssp menziesii sales history


Spiraea douglasii ssp menziesii is included in the following
B and T World Seeds flowering plant categories.

40:   Shrub Seed List, Hardy and Tender
43:   Herbaceous Border Plant Seed List
72:   Russian Native and Introduced Plants (Central)
94:   Natives of Rocky Mountain Area U.S.A.
120:   Alaskan Native Plant Seed List
131:   Toxic Plants
Some of the deadliest known poisons are found in plants. Some major food plants, eaten by millions of people every day, have toxic parts.
185:   Plant Species whose germination is improved by Smoke
"Smoke" contains a butenolide compound produced by certain plants when heated, it speeds up or starts the germination of seeds from many different genera.
597:  Rosaceae


Happier and Healthier Plants, Naturally

plant-fungus communities, for improved nutrition, and disease and drought resistance.


Germination guide for Spiraea douglasii ssp menziesii

These notes are a general guide, it is recommended to check specialist literature for some of the more unusual seeds in our lists.
Seed Germination Theory and Practice by Professor Norman C. Deno
Some knowledge about growing from seed is necessary to germinate even the easiest seeds. Most seeds require humidity to germinate, even desert plants like Welwitschia mirabilis require that their growing medium remains moist until germination.

Most seeds require oxygen to germinate, if buried too deep in their growing medium, or if the medium is too wet, the seeds may not get the oxygen they require.
Some seeds need to be in the light (surface sown) or in the dark (sown deep enough to receive little or no light) to germinate. A rule of thumb is to cover the seeds their own width deep in the growing medium, but some seeds prefer to be sown much deeper, and some fairly large seeds like to be surface sown (or higher).
Many seeds germinate best at certain temperatures, some will germinate at a comparatively wide range of temperatures, yet others need fluctuating temperatures.
Almost all seeds are waiting in a dormant state for some outside stimulus to break their dormancy, some just need sufficiently high ambiant humidity, others need scarification, vernalization or to be passed through the intestines of an animal.

Spiraea douglasii ssp menziesii seeds will usually germinate in 30-40 days.
Sow Spiraea douglasii ssp menziesii seeds about 1mm deep in a Well drained seed sowing mix at about 15°C.


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