Detailed Explanation of Soilless Cultivation Techniques and Hydroponic Methods for Clivia

Hydroponic Clivia is a famous greenhouse flower. China has two species introduced from Europe and Japan. The former has small, drooping flowers and is called Clivia nobilis; the latter has large, upward-facing flowers and is called Clivia miniata, which is currently the most commonly cultivated species. The flowers of hydroponic Clivia are not as magnificent as peonies, nor as fragrant as jasmine, and certainly not as colorful and varied as roses. However, its leaves are verdant and glossy, its flowers point upward like torches, and its blossoms are orange-red and elegantly poised, making it an ideal potted flower for beautifying the environment. Clivia nobilis has drooping flowers that are reserved and profound, elegant and solemn, offering a charm all their own.

1. Growing medium. Peat soil, vermiculite, expanded clay pebbles, perlite, etc. can be used, with expanded clay pebbles and perlite being the most ideal.

2. Preparing the nutrient solution. The formula for self-prepared nutrient solution is 68.5 mg of monopotassium phosphate, 132 mg of ammonium sulfate, 174 mg of potassium sulfate, 246 mg of magnesium sulfate, and 236 mg of calcium nitrate per liter of water, with trace elements added at standard amounts. You can also purchase commercially available soilless cultivation nutrient solution or Clivia-specific nutrient solution from the market, and dilute it with cooled boiled water at the specified ratio.

3. Selecting seedlings and washing roots. Remove a vigorously growing Clivia plant with a good shape from its pot, shake off the old soil without damaging the roots, place it in water at a temperature close to the ambient temperature to soak, wash the roots clean, remove any rotten roots, then soak the roots in the prepared nutrient solution for 8 to 12 hours to allow full absorption of nutrients.

4. Planting in pots. Choose a slightly deep plastic or ceramic pot, line the bottom with a thick layer of plastic sheeting, then first place 2 cm to 5 cm of water-soaked expanded clay pebbles on top, then fill a layer of moist perlite about 2 cm to 5 cm thick, and press down lightly. Lay the Clivia horizontally in a large pot, add moist perlite between the roots, gently cup the roots with both hands and place them in the pot, trying not to let the perlite packed between the roots fall out, then fill moist perlite around the sides until the pot is 80% full, taking care to bury only up to the root crown. Finally, add a layer of expanded clay pebbles on top to prevent perlite particles from being washed away when adding water or pouring nutrient solution, or unsightly green algae from appearing on the surface of the medium due to sunlight. Place a shallow saucer under the bottom of the pot to prevent water seepage.

5. Adding and pouring nutrient solution. Once the Clivia plant is established, pour the prepared nutrient solution until water seeps out from the drainage holes at the bottom of the pot, and also spray some clean water on the leaves.

6. Daily management. Its requirements for light, temperature, and air humidity are the same as for regular soil cultivation. Any seepage collected in the shallow saucer should be promptly poured back into the pot until no more nutrient solution seeps out. Generally, large pots should be supplemented with nutrient solution once every 2 weeks at 200 ml to 300 ml, and small to medium pots should be watered with nutrient solution once a week at 50 ml to 100 ml. Before and during flowering, nutrient solution should be supplemented several more times, and water should be added once a week.

To prevent any mishaps, you can first try with small seedlings, and after gaining some experience, switch to mature plants for soilless cultivation.

Soilless cultivation, how to hydroponically grow flowers, methods of hydroponic flower cultivation

Basic concepts of soilless cultivation

In soilless cultivation, artificially prepared culture solutions are used to supply the mineral nutrition needs of plants. The table lists several commonly used nutrient solution formulas. To keep plants upright, quartz sand, vermiculite, peat, sawdust, plastic, etc. can be used as supporting media, and can maintain root aeration. Years of practice have proven that crops such as soybean, kidney bean, pea, wheat, rice, oat, sugar beet, potato, cabbage, leaf lettuce, tomato, cucumber, etc. all yield higher under soilless cultivation than under soil cultivation. Since plant nutrient requirements vary by species and growth stage, the formula must also be adjusted accordingly. For example, leafy vegetables need more nitrogen (N), which promotes leaf growth; tomatoes and cucumbers need to flower and fruit, requiring more P, K, and Ca than leafy vegetables, and somewhat less N. Different growth and development stages also bring different nutrient needs. For tomato seedlings, the N, P, K and other elements in the culture solution can be reduced; after growing larger, their supply must be increased. In summer, with long daylight hours, strong light, and high temperatures, tomatoes need more N than in autumn and early winter. Tomatoes grown in autumn and early winter require more K to improve fruit quality. When cultivating the same plant, the culture solution formula must also be continuously modified throughout its life.

The culture solution used in soilless cultivation can be recycled. After the prepared culture solution undergoes selective ion absorption by plants, the concentration of certain ions decreases faster than others, the proportions between elements and the pH value change, and it gradually becomes unsuitable for plant needs. Therefore, at regular intervals, NaOH or HCl should be used to adjust the pH of the culture solution, and elements whose concentrations have decreased more should be replenished. Since pH and the concentrations of certain ions can be continuously measured with selective electrodes, the amounts of acid, alkali, or supplementary elements added can be automatically controlled. However, this recycling cannot continue indefinitely. When using a solid inert medium with culture solution, the nutrient solution must also be periodically drained, or a drip irrigation method used to supply sufficient oxygen to plant roots. When plants are transpiring vigorously, the concentration of the culture solution increases, and some water needs to be added. The key to successful soilless cultivation lies in managing the culture solution well so that it meets the needs of optimal nutritional status.

In soilless cultivation, the composition of the nutrient solution is easy to control. It can also be adjusted at any time. In places with suitable light and temperature but no soil, such as deserts, beaches, and barren islands, it can be carried out as long as there is a certain amount of fresh water supply. Suburbs of large cities and households can also use soilless cultivation to grow vegetables and flowers.

Soilless cultivation methods

Water cutting method: This is the simplest and easiest method to succeed with. Utilizing the regenerative capacity of plants, a portion of the stem or branch is cut from a selected mother flower plant and inserted into water, where under suitable conditions it roots, sprouts, and grows into a new plant. Some people jokingly call this the "cloning method."

When cutting branches, cut 3 to 5 mm below a node, with a flat cut surface and no longitudinal cracks. When cutting branches with aerial roots, protect the aerial roots and insert them into water. Pothos, lucky bamboo, and three-colored fine-leaf dragon tree are all suitable for hydroponic cultivation using this method.

Root-washing method: Select an ornamental, robustly growing flower that has already been established in soil cultivation (or other medium cultivation), remove the soil, wash the roots, and switch to hydroponic cultivation. When washing roots, it is best to use running water to reduce damage to the roots and make them easier to clean thoroughly. After washing, plant the flower in a prepared container and add tap water to cover 2/3 to 1/2 of the root system. Initially, change the clean water every day, and wash the roots and container at the same time. After a week, reduce the frequency of water changes. When the cultivated flower grows new roots in the water, it indicates that it has adapted to the hydroponic environment, and you can change the water every 7 to 10 days, or even longer.

Division method: Divide strongly clumping flowers into multiple clumps or individual plants (each plant should retain intact roots), and plant the separated plants using hydroponic methods (refer to the root-washing method for operation). Flowers such as clustered Philodendron bipinnatifidum and Spathiphyllum are all suitable for hydroponic cultivation by division.

Tiller removal method: Suitable for flowers with strong tillering ability, such as Clivia and bromeliads. The method is simple and the survival rate is high. Select a larger tiller, remove the upper soil to expose the connection point with the mother plant, separate the tiller from the mother plant by hand or with a sharp blade (protecting the tiller's roots), wash off the soil attached to the roots, and cultivate hydroponically.

Runner plantlet removal method: Some flowers produce runners during growth, and the runners bear one to many small plantlets. Most of these plantlets have a small amount of fully developed roots, which is their unique reproductive feature, such as spider plants and hanging bromeliads. Taking advantage of this characteristic, removing established small plantlets for hydroponic cultivation is very convenient.

Hydroponic flower enthusiasts are advised to choose Monstera deliciosa, Clivia, Syngonium podophyllum, Spathiphyllum, pothos, mosaic water bamboo grass, Aechmea fasciata, Tillandsia, Aglaonema modestum, Tradescantia spathacea, Tradescantia zebrina, lucky bamboo, variegated periwinkle, spider plant, umbrella plant, and bulbous flowers such as tulip, lily, hyacinth, amaryllis, and gladiolus. These flowers are easy to source, graceful in form, and able to grow normally in still water environments.

Hydroponic methods and precautions for Clivia

Although Clivia is relatively afraid of moisture, hydroponic Clivia can still succeed. Many friends even set up their hydroponic Clivia containers so that flowers are viewed on top, roots below, and fish are enjoyed in the water. So how should Clivia be hydroponically cultivated at home?

Clivia

I. Transitioning from soil cultivation to hydroponic cultivation

Take a two-year-old potted Clivia, rinse it clean with water, cut off old roots and yellow leaves, and place it in clean water that has been left to stand for 1-2 days for cultivation; the water temperature should be around 15-20°C. Initially, the root system should be immersed to a depth of 1/3 to 1/2; gradually increase the amount until the entire root system is submerged, but if water droplets appear on the leaf tips, the water level must be lowered appropriately immediately.

II. Disinfection and prevention work for plants

During initial cultivation or each time you change water, change containers, prune, or trim roots, you can use a clean container filled with 0.1% potassium permanganate solution, and in the intervals between each operation, soak the plant in the solution for 3-5 minutes, then rinse with clean water and place it in the container for cultivation. This serves to disinfect and prevent pests and diseases.

III. Soilless cultivation nutrient solution

Composed of more than 10 macro and trace elements including nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur, with many formulas for the elements used and their contents. For household use, you can generally use small amounts of potted Clivia fertilizer or purchase specialized hydroponic flower nutrient solution from a flower shop.

IV. Water use and nutrient solution use

It should be placed in a brightly lit, well-ventilated location. In daily cultivation and management, generally in hot summer you can change the water every other day or even every day, and add a small piece of charcoal to prevent spoilage. In winter, change the water every 10-15 days. The pH value of the water should be maintained at 6.0-7.0. Periodically apply a small amount of 2-3 drops of nutrient solution. Not only should nutrient solution be added to the water, but it should also be used to spray the leaves (the nutrient solution can be homemade from Clivia fertilizer or purchased at a flower shop) to promote vigorous growth.