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We use several symbols and abbreviations in our catalog:
: especially fragrant
: great for containers
: great cut flower
: heat and/or drought tolerant
: attracts butterflies
: Honey Bee Favorite
: Native Flower
HA -- Hardy Annual.
Hardy annuals can stand some frost, so sow in the open ground well before the last spring frost date, or, in warm winter areas, sow in fall.
HHA -- Half-hardy Annual.
Half-hardy annuals will survive a very light frost but are planted in the open at the last spring frost date or a little later. They can also be started indoors 6-8 weeks before the last spring frost.
TA -- Tender Annuals.
Tender annuals are warm weather plants that cannot withstand any frost and prefer warm nights. Tender annuals with long weeks to bloom (16-18+) should be started indoors 8-10 weeks before the last spring frost.
I order these zinnias every year because my family loves them so. Excellent germination rate in zone 6 New England. I start some indoors under lights and the rest we sow ASAP in early May after the ground warms. We can get many bouquets, as the more we cut, the more flowers we get! The neighbors love to see them in our front yard near the sidewalk. We prefer to plant extra and thin them later, because we always lose a few to hungry critters in the spring. HIGHLY recommend!