The Q&A Archives: Iris Won't Bloom

Question: My iris are not blooming. They have been planted for two years and are healthy looking. They get plenty of sun. What feritilizer should I use or what should I do to encourage blooming?

Answer: Bearded iris like a leanish soil on the slightly dry side in full sun. Soil that is too rich (too much nitrogen, especially), too wet, or in too much shade will lead to lots of foliage and little if any flowers. If you think a fertilzier is appropriate (a soil test will guarantee an exact determination), use one very low in nitrogen and high in phosophorous and potassium (the second and third numbers on a bag of fertilizer).

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