True blue is the rarest colour in any garden. Most flowers labelled “blue” turn out purple or lilac once they open. Ageratum Nano Blu Star is the real thing: soft, genuine blue flowers that hold their colour all summer long. If your Irish garden borders are full of pinks, yellows and whites but missing that cool blue contrast, this is the answer.
At just 20 to 25 cm tall, this compact variety stays neat and tidy from June to September without any trimming or staking. Perfect for edging paths, filling the front of borders, window boxes, patio containers and balcony pots. The fluffy flower heads attract bees and hoverflies throughout the season.
ðą Sowing: March to May
âïļ Light: Full sun to partial shade
ðĄïļ Germination: 7 to 14 days
ð Height: 20 to 25 cm
ðļ Flowering: June to September
ðŋ Growing tips for Ireland Start indoors from March. Ageratum is frost tender, so do not transplant outdoors until after the last frost, late May in most of Ireland. Scatter seeds on the surface of moist compost and press gently. Do not cover, as Ageratum needs light to germinate.
One of the few colourful annuals that performs well in partial shade, making it useful for spots in Irish gardens that only get a few hours of direct sun. Space plants about 15 to 20 cm apart. Water regularly in dry spells but avoid waterlogging. Deadhead occasionally to keep the display fresh, though Ageratum is less demanding than most annuals in this regard.
ðš Part of the Vintage 1928 Range Selected from the Vintage 1928 collection by Franchi Sementi, Italy’s oldest seed house (Est. 1783). Winner of Best Retail Product 2025. Quality and heritage you can trust, grown in Irish gardens.
ðŪðŠ BloomySeeds is the Official Irish Partner of Franchi Sementi. Every packet is genuine, traceable and DAFM registered. Free delivery across Ireland on orders over âŽ40.
