Detailed Explanation of Fertilization Techniques for Red Magnolia

For 1 to 2 years after the seedlings of the flowering red magnolia emerge, proper shade is needed during the midsummer season, and after winter arrives, cold protection is also necessary in northern regions.

Do not damage the root system when transplanting. For large seedlings of the flowering plant, planting should be done with a soil ball, digging large holes, and applying deep fertilization. Before planting, fully decomposed organic fertilizer should be applied abundantly in the holes as base fertilizer. Proper deep planting can suppress suckering and benefit growth. After planting, seal the soil and press it firm, and water thoroughly in time. The best time for transplanting is before bud break, or just after the flowers fade and before leaf expansion.

Summer is the growing season for the red magnolia. The red magnolia likes fertilizer. In addition to emphasizing base fertilizer, acidic soil should be given appropriately more phosphorus fertilizer. Topdressing before and after flowering is especially important. Fertilization should seize the two key timings of February before flowering and May after flowering, applying a nitrogen-phosphorus-potassium compound fertilizer about once every ten days.

The former makes the buds swell and the flowers open, while the latter promotes more bud formation and more flowers the following spring. When leaves fall in early winter, apply a fertilizer mainly of phosphorus and potassium once to enhance its cold resistance and ability to overwinter, and apply little or no fertilizer at other times. Avoid applying nitrogen fertilizer alone.