{"product_id":"25-seeds-double-blackberry-hollyhock-alcea-rosea-deep-purple-black-double-blooms-biennial-tall-cottage-garden","title":"25 Seeds Double Blackberry Hollyhock Alcea Rosea Deep Purple Black Double Blooms Biennial Tall Cottage Garden","description":"\u003cp\u003eThese Double Blackberry Hollyhock seeds produce dramatic deep purple-black, fully double flowers on tall, sturdy stalks. This Alcea rosea variety is a cherished cottage garden classic, adding old-fashioned charm and vertical interest to sunny borders.\u003c\/p\u003e\n\n\u003cp\u003eExcellent for cut flower arrangements and as a backdrop for shorter perennials, these biennial plants typically bloom in their second year. They thrive in full sun and well-drained soil, reaching heights of up to 8 feet. Provide support in windy locations and deadhead spent blooms to encourage continued flowering.\u003c\/p\u003e\n\n\u003cp\u003eSpecies: Alcea rosea\u003cbr\u003e\nVariety: Double Blackberry\u003cbr\u003e\nType: Flower seed\u003cbr\u003e\nPlant_Habit: Tall single stalk\u003cbr\u003e\nSun: Full sun\u003cbr\u003e\nSoil: Well-drained, moderately fertile\u003cbr\u003e\nDays_to_Harvest: Not applicable\u003cbr\u003e\nZones: 3-9\u003cbr\u003e\nGermination: 10-20 days at 60-70°F (15-21°C)\u003cbr\u003e\nSowing: Sow seeds indoors 6-8 weeks before last frost or direct sow in early spring or fall; press onto soil surface as light is needed for germination\u003cbr\u003e\nSpacing: 18-24 inches\u003cbr\u003e\nNotes: Biennial; flowers in second year; may require staking\u003c\/p\u003e","brand":"Blake's Flora \u0026 Soil","offers":[{"title":"Default Title","offer_id":67662780006536,"sku":"TOADS-246","price":13.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/4648\/6408\/files\/download_d21d23ab-8680-4b3b-8385-4e2f1dbc9aec.jpg?v=1791894706","url":"https:\/\/www.natesgardensupply.com\/products\/25-seeds-double-blackberry-hollyhock-alcea-rosea-deep-purple-black-double-blooms-biennial-tall-cottage-garden","provider":"Nate's Garden Supply","version":"1.0","type":"link"}