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Production Time to Marketable Plants

Asked by:

Julie Poirier

Posted at:

January 26, 2025

I'd like to know how many weeks it takes to grow the following plants to a marketable 3 1/2 inch pot and if there are any special treatments required such as freezing or what not.
I will put the approximate number of weeks it takes to produce a marketable 3 1/2 inch (9 centimeter) pot from seeds, beside the name of the plant – plus any germination comments.
Betony – Stachys officinalis
17 weeks.
Cicely, Sweet – Myrrhis odorata
27 weeks – keep seed flat outdoors during winter.
Clary – Salvia sclarea
15 weeks.
Coreopsis – Coreopsis tinctoria
8 weeks.
Dill – Anethum graveolens
6 weeks – surface sow and press onto soil – keep in bright spot.
Licorice, Chinese – Glycyrrhiza uralensis
Not available, but probably about 25 weeks.
Mallow, Mauritian – Malva sylvestris mauritanica
12 weeks.
Osage-Orange – Maclura pomifera
13 weeks – soak seeds in water for 1-5 days, rinsing daily, repeat with detergent water 2-5 days
Painted Daisy – Tanacetum coccineum
16 weeks.
Pink, Sweet – Dianthus x hybrida 'Rainbow Loveliness'
10 weeks.
Rocket, Sweet – Hesperis matronalis
Not available, but should come in about 4 weeks.
Thyme, Creeping – Thymus serpyllum
18 weeks.
Wild Bergamot – Monarda fistulosa
8 weeks – surface sow and give light.
Wild Indigo – Baptisia tinctoria
Not available, but other species take 11-13 wks – puncture seed.
Wormwood – Artemisia absinthium
17 weeks – dry store freshly harvested seed 6 months at 21 degrees Celsius.
Yarrow, Red – Achillea millefolium 'Rubra'
12 weeks – dry store freshly harvested seed 6 months at 21 degrees Celsius.