What to Do When a Clivia miniata Gets Stuck Flower Stalks? A Few Countermeasures to Teach You
Stuck flower stalks when a mature Clivia miniata blooms are a problem growers often encounter. There are many causes of stuck stalks, and different measures must be taken to improve the situation according to each cause.
1. Unsuitable temperature. The suitable temperature for Clivia miniata to bloom is 15-25°C, and the day-night temperature difference should ideally be around 10°C; after the flower stalk of Clivia miniata has formed, keep the room temperature at around 18°C, and the day-night temperature difference had best remain at 6-10°C, otherwise the flower stalk will bloom before it grows to the proper height, and the stuck-stalk phenomenon will appear. This is especially true for Clivia miniata kept indoors at home, where the daytime and nighttime temperatures are similar, with a temperature difference of only 2-3°C, which is not conducive to the stalk shooting up.
Solution: Put it on the windowsill during the day, and at night put it in a place 6-10°C below the windowsill temperature (the indoor temperature must not be below 15°C during the early morning hours). In this way, an environment with a large temperature difference is created artificially, and the stalk can shoot out. The nighttime temperature should be low, and the daytime temperature should be raised.
2. Improper fertilisation. Excessive chemical fertiliser or uneven and improper fertilisation methods can put the root system in an oxygen-deficient state, causing root damage or root rot, blocking nutrient transport, and promoting stuck stalks.
Solution: After Clivia miniata is brought indoors, a small amount of solid fertiliser can first be applied, such as fermented soybean cake, decomposed sesame oil residue, roasted bone meal and dried blood meal, etc. Afterwards, about every 20 days, combined with watering, apply once a fermented soybean cake water. The amount of nitrogen fertiliser applied must be strictly controlled to prevent leggy leaves and adverse effects on blooming. Plants about to bloom can be given an appropriate additional application of some phosphorus and potassium fertiliser to promote flower bud differentiation and formation, rapid stalk shooting, and earlier blooming.
Once the stuck-stalk phenomenon appears, take measures by tipping out the soil, washing the roots and drying them: after washing the root system with clean water, dry it in a cool place for 4-5 hours, replace it with loose new nutrient soil, and after a few days the stalk can shoot out.
3. Irregular watering. Clivia miniata has fleshy roots and fears waterlogging. Watering too much or watering only halfway, or the potting soil being too dry, easily causes the root system of Clivia miniata to suffocate, rot and wither, with poor nutrient supply, making stuck stalks likely. This is the mistake growers most easily make.
Solution: Avoid waterlogging from too much watering or watering only halfway, which affects root absorption. The potting soil is best kept slightly dry, and watering once about every 20 days is fine. Especially in winter, because the temperature is relatively low and water evaporates slowly, the amount of watering should be controlled even more. The water temperature for watering should not be too low and should be equivalent to room temperature. To increase air humidity, water can be sprayed on the ground around the pot. When watering and washing leaves, also prevent water from accumulating in the leaf axils, otherwise heart rot and stuck stalks will also occur. Once stuck stalks appear, immediately replace with new soil, water thoroughly, and cultivate new roots; after the new roots grow, the stalk will shoot out accordingly.
Specific method for restoring new roots: First tip the Clivia miniata with rotten roots out of the pot, remove the soil, cut off the rooted parts, wash the roots with clean water, then apply a potassium permanganate aqueous solution to the rotten root areas, then wrap all the leaves with white paper, expose the roots, face the roots toward the sun, and sun them in sunlight for 0.5 hour, using ultraviolet rays to kill pathogens. After the above treatment, if only a few roots of the diseased plant have rotted, it can be planted directly into disinfected nutrient soil, watered less for the first 15 days, and growth can be restored in 1.5 months; if more than half or all of the roots of the diseased plant have rotted, it should be planted in a pot filled with fine sand, placed in a cool place, kept moist to slow the roots and sprout new roots; in an environment of 22-25°C, new roots can be seen in about 15 days, and in about two months it can be transplanted into nutrient soil. After replacing the nutrient soil, normal management can be carried out.
The nutrient soil for Clivia miniata is mainly prepared from leaf mould (oak leaves), pine needles and coarse sand, with the proportions: 30% leaf mould, 30% pine needles, 20% coarse sand, 10% small hemp seeds (dry-roasted and cooked), 5% charcoal, 5% defatted bone meal. This type of nutrient soil has good permeability and rich nutrients, is suitable for the growth characteristics of Clivia miniata, and is not prone to root rot; once new roots grow, it can supply the stalk system with plenty of nutrients, enabling it to quickly push the stalk out.