Place them outdoors in an area where they will experience the snow and cold of winter. Plant seed 0.32 cm (1/8 inch) deep in pots and label In late fall through to mid-winter fill plastic pots with a slightly moistened, sterile, soil-less growing mix. Plant seed 0.32 cm (1/8 inch) deep in a prepared seed bed in late fall so that the seed overwinters and germinates naturally in spring. When seedlings are 5 cm (2 inches) tall or more, transplant into the garden spaced 30 cm (1 foot) apart.
After stratifying, plant seed 0.32 cm (1/8 inch) deep in pots. Boltonia is a large, late summer showstopper that looks almost like a tall babys breath in a perennial border. Repeat this for one week, alternating between the fridge and the freezer. The next day place this in the freezer for one day. Put this in a labelled, sealed plastic bag and store in a refrigerator for one day. Start at least 5 weeks before outdoor night temperatures are reliably in the 10 C (50 F) range. 66 seeds per pack - 1,203 seeds per gramĪttracts Butterflies, Honeybees & Songbirds!Īll Wildflower Farm seeds are hardy through growing zone 3, organic and non-GMO.Ĭold, moist stratification. Symphyotrichum laeve does well in just about anyĪpprox. Naturally occurring in open woods, disturbed habitats, meadows and fields it is aįavourite stopping spot for butterflies and it is the larval host for the Pearl Crescent butterfly. The leaves of Smooth Blue Aster are smooth to the touch and it puts on a fabulous floral display with a profusion of lavender-blue, star-like flowers Blooming from late August through to the end of October, Smooth Aster is one of the most attractive and long-lived of all the asters.
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