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Information and prices for
Delphinium grandiflorum Summer Nights deep blue

Approximately 650.00 seeds per gram
seed-counts are only a guide, not to be used for accurate calculations.

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Delphinium grandiflorum Summer Nights deep blue
100 seeds for 8 Euros
available for preorder


Delphinium grandiflorum Summer Nights deep blue
We do not know how many seeds there will be in a packet !
If we know the quantity of seeds, we list the quantity as:
examples '200 seeds' or '0.50 gram', not as packet.
1 packet for 14 Euros
available for preorder


Delphinium grandiflorum Summer Nights deep blue
250 seeds for 16 Euros
available for preorder


Delphinium grandiflorum Summer Nights deep blue
500 seeds for 30 Euros
available for preorder


Delphinium grandiflorum Summer Nights deep blue
1000 seeds for 55 Euros
available for preorder


Delphinium grandiflorum Summer Nights deep blue
1 gram for 62 Euros
available for preorder


Delphinium grandiflorum Summer Nights deep blue
10 gram for 520 Euros
available for preorder



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Delphinium grandiflorum Summer Nights deep blue

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Elements of Structural and Systematic Botany
B and T World Seeds' Botanical Glossary

B and T World Seeds' reference number: 442019

The average, annual, minimum temperature zone where Delphinium grandiflorum Summer Nights deep blue is cold hardy
USDA Zone:3 -40° to -30°F   (-40° to -34.5°C)
Type of plant - annual or perennial, depending on climate
Flower or inflorescence: deep BLUE
Height, in meters: 0.3
Height, in feet: 0.99
Delphinium grandiflorum Summer Nights deep blue sales history
Parts of Delphinium grandiflorum Summer Nights deep blue are considered toxic.


Delphinium grandiflorum Summer Nights deep blue is included in the following
B and T World Seeds flowering plant categories.

9:   Alpine and Rock Garden Seed List (Hardy and Tender)
31:   House and Container Plant Seed List
43:   Herbaceous Border Plant Seed List
44:   Cut flowers Commercial and other Recommended Varieties
53:   Bedding 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.
587:  Ranunculaceae
698:   First Year Flowering Perennials


Happier and Healthier Plants, Naturally

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


Germination guide for Delphinium grandiflorum Summer Nights deep blue

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.

Delphinium grandiflorum Summer Nights deep blue seeds will usually germinate in 14-21 days.
Normally germinates in the dark. Sow Delphinium grandiflorum Summer Nights deep blue seeds about 2mm deep in a Peaty seed sowing mix at about 10°C.

Delphinium grandiflorum Summer Nights deep blue seeds need to be "overwintered" before they will germinate.

Stratification; cold treatment or vernalization. Seeds of some species need just a couple of weeks, others 3 months. Seeds can be stratified in dampened peat or sand, in a plastic box or bag at 4°C or 5°C in a refrigerator. The seeds should not be frozen or in a wet medium. Very small seeds can be sown on the surface of their growing medium, in pots sealed in plastic bags, and kept in the 'fridge. Many vernalized seeds need light to germinate when they are sown in the "Spring".
Seed Germination Theory and Practice by Professor Norman C. Deno

Cold stratify 2 weeks High temperatures cause dormancy.


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