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We use several symbols and abbreviations in our catalog:
: Especially fragrant flowers : Scented leaves : Great for containers : Great cut flower : Deer-resistant : Heat and/or drought tolerant : Attracts butterflies : Attracts hummingbirds : Attracts bees : Attracts beneficial insects : 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 have only seen Irish tassel flowers at botanical gardens and was delighted to find seeds available. I have little experience with growing seedlings, but was successful and now have tassel flowers in bloom in my garden. I am hoping they self-sow successfully. They are tiny but intense bursts of color that are a real delight. (Pictured with creeping thyme and California poppies)