Agapanthus have few problems. Are there any pest or disease problems? Any suggestions to the problem would be appreciated. In frost-free climates, flowers of evergreen varieties appear over a long season; in cooler zones, summer is the principal flowering season. Jason-3 Posts: 369. It spreads perfectly, and without any problems by self-sown seeds making a superb, slowly spreading carpet. Use water-soluble, quick-release fertilizer every two weeks during the growing season or slow-release fertilizer once during the growing season. To encourage blooming, use a 10-20-20 fertilizer (10 parts nitrogen by weight and 20 parts each of phosphorus and potassium). by annell » Wed Mar 19, 2008 6:25 am . Always wear gloves, long sleeves, and goggles when cutting agapanthus stems. WHERE TO PLANT AGAPANTHUS. Agapanthus flowering problems are actually quite common. The agapanthus, also known as the lily of the Nile or African lily, is a perennial that originated in South Africa. I have about 180 of the plants in my garden and, of course, don't want to lose them. If one of your plants is infected with root or bulb rot, it can’t be saved. You should wait for three years or more before you divide the roots. If you don’t fertilize your agapanthus the first year, it might not bloom. Bulb rot and root rot are both agapanthus problems that start underground. Any ideas why? Use water-soluble, quick-release fertilizer every two weeks during the growing season or slow-release fertilizer once during the growing season. I live in the central western slopes and plains of NSW. Problems With Agapanthus. Whether grown in a container or in the ground, Agapanthus should be divided every 4 years or so—deciduous types in March, just before they start growing, and evergreen types immediately after flowering. Growing agapanthus for the first time. Thanks, AnneE . Here are a few of our favourites. Sign up to get all the latest gardening tips! The agapanthus, also known as the lily of the Nile or African lily, is a perennial that originated in South Africa. Most agapanthus are hardy and their leaves die down in winter. Tall stalks hold large clusters of purplish-blue or white flowers in summer and early fall. Agapanthus look great when planted with drifts of ornamental grasses, sun-loving rudbeckias and goldenrod (Solidago). Agapanthus frequently doesn’t flower during its first year. Agapanthus is Sometimes called lily of the Nile, agapanthus are extraordinary showy, garden flowers, They have tall stems with exotic looking blossoms in striking blue, mauve, white and pink, and coming to their peak in July & August. 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Agapanthus hail from the south African Cape, so they appreciate plenty of sunshine. Too rarely seen, this plant is a perfect item for naturalising as its narrow, linear leaves soon die completely away after flowering leaving a clear patch for flower coming later. Problems. However, learning the most prevalent reasons this happens can help you overcome your disappointment and ensure better future flowering. Agapanthus species can be grown from collected seed but the cultivars will not come true to type. Your soil is probably alkaline as you are in Adelaide but I'm in inland NSW with alkaline soil and we have no trouble growing them with lots of flowering, so I don't think that is your problem. This has changed with Ozbreed’s repeat mass flowering Agapanthus varieties. Agapanthus … Agapanthus that are watering and in full sun should flower, but they become congested over the years and this stops the flowering. The most commonly asked question is ‘Why aren’t my plants flowering?’. 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