What will the fertilizer do? A slow-release fertilizer will promote flowering, increasing the number of flowers and of course, seed pods per plant, even if you do not thin as much. Brianna Perry2023-03-20T22:30:44+00:00March 17, 2023|Planting and Growing, Poppy Seed General Information| Share This Story, Choose Your Platform! FacebookXRedditLinkedInWhatsAppTumblrPinterestEmail