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Comments and legend for perennial and biennial
A – Germinates very irregularly over a long period. Lowering temperature to less than +5°C is very effective.

B – If no germination occurs after 3-4 weeks, a cooling period of 2 weeks at 5°C is recommended.

C – Keep warm and moist at 18-22°C for 2-4 weeks. For the next 4-6 weeks, transfer sowing to temperature between -4°C and +4°C. Finally, come back
to temperature between 5°C and 12°C.
D – Same as in C but the cooling period should be around -5°C because the freezing point of this seed is -7°C compared to others seeds that freeze at -5°C.

E – Soak the seeds for a day. Sow in sand covering the seed trays to keep darkness and humidity. Transfer the seed trays at 5°C for a period of 3 months.
Once established keep the seeding at 15°C and bloom will start in 16 months.
F – Pre-chilled seeds at 5°C (refrigerator) for 3 weeks and then sow at 15-18°C.

Sowing guide - Perennial and Biennial
Botanical name	Seeds / grams	Flowering year	Germination temp ºC	Number of days	Growth temp ºC	Flowering month	Zone	Comments
Achillea	5000-6000	Year 1	20-24	7-14	16	06-08	2b
Aconitum napellus	350	Year 2	See comments			06-08	2b	D
Agastache urticifolia	2000-4000	Year 1	14-22	7	21-24	06-09	4	Flowers in 10-12 weeks, needs 14 hours of day lenght.
Alchemilla mollis	2800	Year 2	See comments			06-07	3	C
Althaea rosea	100-200	Year 2	18	14-21	12-15	07-08	3
Alyssum	500-1000	Year 2	16-18	21-30	10-13	04-06	3
Anacyclus depressus	1400	Year 2	18-20	7-10	15-18	06-08	4
Anaphalis margaritacea	20000	Year 1	18-21	10-14	16-18	06-10	2-3	Do not cover seeds.
Anchusa capensis	400	Year 2	18-21	14-21	15-18	06-07	4
Anemone sylvestris	2500	Year 2	18-20	7-10	15-18	05-06	4
Anthemis tincoria	2000	Year 1	21-22	3-7	15	06-09	3
Aquilegia	500-1000	Year 2	30 day / 21 night	14-30	10	05-06	3	Slow and irregular gemination.
Arabis caucasia	3000	Year 2	21	15	10	04-05	3
Arenaria montana	800	Year 1	18-20	10-14	15-18	05-07	3
Armeria	800-100	Year 1	16-18	14-21	13	06-07	3	Slow and irregular gemination.
Aruncus	7000	Year 2	20	7-14	15	05-08	3	B
Asclepias	200	Year 1	21-24	21-28	18	06-09	3	Slow and irregular gemination.
Aster alpinus	700	Year 2	21	15	10	05-06	3
Aster ptamicoides	300	Year 2	21	15	10	08-09	3	B
Astible arendsii	1700	Year 2	18 day / 10 night	21-08	10	07-08	3-4
Aubrieta cultorum	2500	Year 2	18	20	10	07-08	3-4
Baptista autralis	60	Year 2	20	14-21	15	05-06	3	Slow and irregular gemination.
Bellis perennis	4750	Year 2	21-24	7-14	10-13	05-06	3
Bergenia cordifolia	4000	Year 2	22-24	12-21	18	04-05	3	Needs constant warm temperature.
Calamintha grandiflora	500	Year 2	See comments		15-18	07-08	5	C
Campanula carpitaca	12000	Year 2				07-09	3
Campanula colchlearifolia	12000	Year 2	See comments			07-09	3	A
Campanula glomerata	10000	Year 2	21	14-21	1315	06-08	3
Campanula latifolia	3000	Year 2	18-21	14-21	13-15	06-07	4
Campanula medium	4500	Year 2				06-07	3
Campanula persicifolia	16000	Year 2				06-08	3
Campanula poscharskyana	18000	Year 2				06-09	3
Campanula primulaefolia	30000	Year 2	20	14-21	13-15	07-08	3
Centaurea	75-100	Year 1	16-18	14-21	16	05-08	4	Slow and irregular gemination.
Cerastium tomentosum	3000	Year 2	16	14-21	10	05-06	3
Coreopsis grandiflora	400	Year 1	20-24	7-21	10	07-09	3	Slow and irregular gemination.
Cymbalaria muralis	5000	Year 2	18-20	10-14	15-18	06-09	4
Delphinium belladonna	500	Year 2	26 day / 21 night	14-18	15-18	06-09	3-4
Delphinium x cultorum	500	Year 1	18-24	14-18	10-13	06-08	3	For the Pacific Giant alternate Day / Night from 26°C to 21°C.
Delphinium grandiflorum	1000	Year 1	18-24	14-18	15-18	06-09	3-4
Dianthus barbatus	1000	Year 2	15-20	13-18	13-14	06-09	3
Dianthus caryophyllus	500	Year 2	15-21	13-18	13-14	06-09	3
Dianthus deltoides	3500	Year 1 or 2	15-21	13-18	13-14	06-07	3
Dianthus plumarius	800	Year 1	15-21	13-18	13-14	06-08	3
Dianthus x alwoodii	800	Year 2	15-21	13-18	13-14	06-08	3
Dicentra spectabilis	200	Year 2	See comments			05-06	3	C
Digitalis grandiflora	7000	Year 2	15-18	5-10	13-15	06-08	4-5	Do not cover seeds.
Digitalis purpurea	6000	Year 2	15-18	5-10	13-15	06-08	4-5
Doronicum causasicum	1400	Year 1	21	10-20	10	05-06	4
Echinacea purpurea	300	Year 2	21	7-14	10	07-09	3	B
Echinops ritro	65	Year 2	18-22	14-20	15-18	07-09	3
Erigeron speciousus	3500	Year 2	21	14-21	13-15	06-08	3
Eryngium planum	850	Year 2	21	15	15-18	07-08	4
Euphorbia mysinites	80	Year 2	30 day / 21night	21-28	12-15	05-06	4
Euphorbia polychroma	280	Year 2	30 day / 21 night	21-28	10	05-06	4-5	Slow and irregular germination.
Wild flowers	1300	Year 1-2	21	14-21	-	06-09	4	Direct seeding outside, after risk of ground freezing is cover.
Gaillardia aristata	400	Year 1	20-24	5-15	10	06-09	3
Gentiana septemfida	13000	Year 2	See comments			07-08	4	C
Geranium sanquineum	100	Year 2	18-21	28-40	18	06-08	4	A
Geum chiloense	400-800	Year 2	20-24	10-20	10	06-08	3
Gypsophila paniculata	1100	Year 2	21	7-10	10	06-08	4
Gypsophila repens	1100	Year 1	21	7-10	15-18	05-07	4
Helenium autumnalis	5000	Year 1	18-22	14-20	15-18	08-09	3
Helianthemum nummularum	800	Year 2	21-24	15-20	10-13	06-09	3
Heliopsis	100	Year 1	18-21	14-21	13	07-09	3
Hesperis matronalis	500	Year 2	21-26	5-7	13	06-07	4
Heuchera	32000	Year 1	18-21	10-18	10	06-09	3	Do not cover seeds.
Heuchera sanquinea	2500	Year 2	18-21	10-18	15-18	06-08	3
Heteropappus meyendorifi	700	Year 1	15-18	14-20	12-15	08-09	4
Hibiscus moschutos	100	Year 1	18-25	3-5	21-30 day, 18-21 night	08-09	5	Need constant warm temperature.
Iberis sempervirens	300	Year 2	16-18	16-20	10	05-06	3
Incarvillea delavayi	250	Year 2	20	7-14	15	05-06	4
Inula ensifolia	2700	Year 2	20	14-21	15	06-07	4	Slow and irregular germination.
Knautia macedonica	200	Year 2	15-20	14-21	10-15	07-08	5	A
Kniphofia uvaria (tritoma)	450	Year 2	18-24	21-28	10	07-09	5	A
Lathyrus latifolius	20	Year 1	18-21	14-21	10	07-09	3
Lavandula angustifolia	1000	Year 2	18-21	21-28	10	06-09	5	B
Leontopodim alpinum	7500	Year 2	21 day / 10 night	10-14	10	06-07	4	Do not cover seeds.
Leucanthemum	1000	Year 2	18-20	10-14	15-18	06-08	3
Lewisia cotyledon	1700	Year 2	5	15-90	15	16 après la levée	4	E
Liatris spicata	350	Year 2	18-21	14-21	10	08-10	3	Slow and irregular germination.
Ligularia pizewallskii	500	Year 2	20	14-21	13-15	07-09	5	Slow and irregular germination.
Linum perenne	700	Year 1	18-21	7-14	10	06-07	5
Lobelia cardinalis	20000	Year 1	21 day / 10 night	14-21	10	07-10	3
Lunaria annua	50	Year 2	18-24	10-14	13-15	05-06	4	A
Lupinus polyphyllus	45	Year 1	21-24	16-20	10	06-07	3
Lychnis	2000-2500	Year 1	21 day / 16 night	14-21	16	07-08	3
Lysimachia atropurpurea	1000	Year 2	20-22	14-21	10	06-08	3	Sow in May-June.
Lysimachia punctata	1000	Year 2	16-21	30-90	10	06-08	3
Lythrum salicaria	11000	Year 1	20	7-14	20	07-09	3	B
Malva	450	Year 1	21-22	3-6	10	06-09	3
Monarda didyma	2000	Year 1	18-21	14-21	16	07-09	4
Myosotis alpestris	1600	Year 2	20-22	8-14	13	04-05	4
Myosotis palustris	500	Year 2	20-22	8-14	13	06-09	4	Slow and irregular germination.
Nepeta mussinii	1200	Year 1	20	17-21	16	05-07	4	B
Oenothera	200	Year 1	24 day / 18 night	14-20	18	06-09	4
Papaver alpinum	7000	Year 1	18-20	7-14	10-13	06-08	4
Papaver orientale	4000	Year 2	18-24	7-14	10-13	05-06	3
Papaver miyabeanum	9500	Year 1	18-24	7-14	15-18	06	5-6
Papaver nudicaule	5000-7000	Year 1	18-24	7-14	10-13	07-09	3
Papaver ruprifragum	12000	Year 2	15	10-15	10-13	06-08	3	Sow in July.
Papaver sendtneri	7000	Year 2	18-24	7-14	15-18	05-06	3
Penstemon barbatus	1400	Year 1	16-18	14-28	10	06-08	4	A
Petrorhagia illyrica	5000	Year 1	20	7-14	16-18	07-08	4
Phlox paniculata	80	Year 2	15-18	10-15	10-13	06-09	3
Physalis franchetii	600	Year 1	18-24	14	18	06-09	3	Need constant warm temperature.
Physostegia virginiana	400	Year 2	24 day / 18 night	14-21	10	07-09	3	A
Platycodon grandiflorum	1200	Year 2	18-21	21-28	18	07-08	3
Polemonuim viscosum	1000	Year 1	18-20	7-10	15-18	06-07	3
Potentilla nepalensis	2500	Year 2	21	14-21	13-15	06-09	4	Slow and irregular germination.
Primula	1000	Year 2	15-18	21-28	7-10	01-07	4-5
Pulsatilla vulgaris	500	Year 2	See comments			05	4	C
Rudbeckia fulgida	900	Year 2	21	7-14	10	07-09	3	B
Sagina subulata	45000, 55000	Year 2	18-23	21	15-18	06-07	4	Do not cover seeds
Salvia lyrata	500	Year 1	20	21	16-18	06-08	3
Salvia superba	1000	Year 2	21	12-15	21	06-08	4
Saponaria ocymoides	500	Year 2	16-18	14-21	13	05-06	3
Saxifraga x arendsii	16000	Year 2	21	14-21	13-15	05-06	4	Slow and irregular germination.
Scabiosa caucasica	75	Year 1	22	14-21	18	07-09	3	Need constant warm temperature.
Sedum	800	Year 1-2	16	10-14	10	06-07	3	Do not cover seeds.
Sempervivum sp.	13000	Year 2	18-21	10-14	16	07-08	3	B
Silene maritima	11000	Year 2	20-25	10-14	10	06-08	4
Stachys lanata	500	Year 2	21	8-15	15	07-08	4
Tanacetum coccineum	500	Year 2	20-24	7-14	15-18	06-07	3
Tanacetum niveum	8500	Year 1	20	10-14	15-18	08-09	3	Sow from September to January.
Tanacetum parthenium	8000	Year 2	18-20	14-21	15-18	07-09	4
Thalictrum	500	Year 2	18	20-30	10-12	06-07	4
Thymus serpyllum	6000	Year 2	21	3-6	14	07-08	3
Trollius europaeus	950	Year 2	See comments			05-06	3	C
Veronica	8000	Year 2	16-21	14	10	06	4
Veronica gentianoides	2000	Year 2	18	15-20	10	05-06	3	Sow in May, do not cover seeds.
Veronica incana	14000	Year 2	16-21	14	15-18	06-07	4
Veronica spicata	10000	Year 2	16-21	14	15-18	06-08	4
Viola labradorica	850	Year 2	See comments		10-16	05-10	4	C
Viola odorata	250	Year 2	See comments			04-05	4	C
Viola sororia	1000	Year 2	15	10-50	10	05-06	3	F- Sow in April.
Viola sylettas	2000	Year 2	15-18	10-50	10	05-06	-	F-Sow in September-October. Seeds can start germinate at 5º C.