Yellowing of new leavesSome flower lovers have just bought roses, and they have started to turn yellow from the "top" within a few days. This is mainly the new leaves, and the old leaves are not a big deal. Reasons: 1. Excessive watering; 2. Iron deficiency Flower lovers, use the process of elimination to see what the cause is for your roses. Generally, if you buy them home with the soil, they won't be iron deficient immediately. Maybe it's because you watered them too much. Countermeasures: 1. Reduce watering and water only when the soil in the pot is dry 2. Pour ferrous sulfate solution, or ferment rice water for 1-2 weeks, add 70% clean water, and pour it into the pot soil, but don't pour it on the rose. Old leaves turn yellowWhen flower lovers see the leaves turning so yellow, they become extremely anxious. What can they do? Haha, you are really worrying about nothing. Your rose has no disease. Reason: Normal metabolism, natural replacement of the old with the new Roses grow fast, new leaves keep popping up, and the old leaves at the bottom naturally "retire" Countermeasures: Remove the old leaves directly and do not leave them in the pot to prevent them from rotting, breeding bacteria and causing other diseases. Old leaf tips turn yellow and dryIf the old leaves of the rose are not completely yellow, but start to turn yellow and dry up from the tips, this is not natural aging, but lack of nutrition! Cause: Potassium deficiency Roses that are deficient in potassium not only have abnormal leaves, but also have poor growth and are relatively thin. Generally, if the potting soil is mostly peat soil or sandy soil, it is easy to be deficient in potassium. Countermeasures: 1. Add some leaf humus to increase overall nutrition 2. Water with potassium sulfate solution 1-2 times a month 3. Remove old leaves and do not place them in pots to prevent rot and bacterial growth. The leaves are yellow and unevenIf the leaves are yellow, orange, have dark veins, and have some bumps on the surface, it means they are lacking some nutrients. Cause: magnesium deficiency, calcium deficiency Generally, magnesium deficiency and calcium deficiency occur at the same time, and the rose begins to grow poorly or stop growing, and then the leaves turn yellow and fall off. At this time, it is difficult to bloom. Countermeasures: 1. Pour magnesium sulfate solution (water solubility is 0.1%) 2. Add 2-5 grams of bone meal to the potting soil every month; add crushed egg shells 3. Soak soybeans in water and ferment for 1-2 weeks, then add water and water the soil in the pot (concentration is 0.2%) All leaves turn yellowThe leaves that were growing strong have completely lost their green color, and even the veins have turned yellow. The yellow leaves still have a little orange and red. Cause: Lack of sulfur and nitrogen Generally, if the leaves are deficient in sulfur, the upper leaves will turn yellow first, while if the leaves are deficient in nitrogen, the lower leaves will turn yellow first. Flower lovers can judge by the position of the yellow leaves. Countermeasures: 1. Check whether the soil in the pot is loose and loosen it appropriately. 2. Remove yellow leaves and prune weak branches 3. Add nitrogen fertilizer and urea, apply thin fertilizer frequently 4. Add manure and bean cake fertilizer Leaves curl and turn yellowSome flower lovers have good roses, but the leaves start to curl and turn yellow. Some even have burnt yellow edges, as if they were burned by fire. Causes: 1. Hypertrophy; 2. Hypertrophy injury The leaves are still green and shiny, the veins are dark in color, and there is no insect pest. It should be hypertrophy or fat damage, which is not a good thing. In serious cases, it will directly burn the rose. Some flower lovers are wondering, I don’t apply any fertilizer at home, how can it be that the fertilizer is causing damage? Rain in some areas causes the salinity in the soil to increase, and the rose roots can no longer absorb Countermeasures: 1. Stop adding fertilizer. If only a few leaves curl up, water more often to dilute the fertilizer. 2. If you are composting, take out some fertilizer appropriately. 3. For more serious hypertrophy, it is best to change the soil directly 4. Fertilizer damage: remove the top layer of soil, temporarily control water, and water again when the soil is dry. If the condition is serious, change the soil directly. Raising roses is not that difficult Mastering these small details If you have seedlings, you don't have to worry about their growth |
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