Sunday, January 7, 2024

Houseplants have care requirements

Care

"Flowers on the Windowsill", 1894

Houseplants have care requirements that differ from plants grown outdoors. Moisture, light, soil mixture, temperature, ventilation, humidity, fertilizers, and potting are all important factors. Each plant species has different care requirements, and care requirements can vary based on the specific pot, location in a particular home and potting mix used.

Most houseplants are species that have adapted to survive in a temperature range between 15 °C to 25 °C (60 °F to 80 °F) year-round, as those adapted for temperate environments require winter temperatures outside of normal indoor conditions.[32] Within that limitation, there are houseplants which are native to many different types of habitats, from tropical rainforests to succulents and cacti native to deserts. Many houseplants are either epiphytes or live in seasonally dry ecosystems that help them adapt to the dry indoor air and inconsistent watering many houseplants are subject to. Often, houseplants from tropical areas are understory plants, and because they grown in shady conditions naturally, they are often able to thrive in lower-light conditions.

Selected houseplants are typically of healthy origin, with tidy leaves and upright stems. Houseplants which survive in conditions similar to a homeowner's living space will have a higher probability of survival. Tropical houseplants which grow under high thresholds of heat, for instance, will grow sun leaves which contain fewer chloroplasts. Plants which grow in the shade will grow shade leaves, containing more chloroplasts. Horticulturists at Texas A&M University recommend acclimatization, a gradual process in which plants with too much or too little light or heat exposure are balanced accordingly to prevent overexposure. The brightness and strength of the light source under which a plant lives, including how long it spends under that light source, is vital to its survival. Other factors, like humidity and ventilation, must be kept under regular levels to prevent plant failure and susceptibility to disease.[33]

Houseplants are typically grown in specialized soilless mixtures called potting compost (in the UK), potting mix, or potting soil.[34] Most potting mixes contain a combination of peat or coir and vermiculite or perlite.

Keeping plants consistently too wet ("overwatering") leads to the roots sitting in water, which often leads to root rot. Root rot is the most common cause of death for houseplants but keeping houseplants too dry ("under-watering") can also be detrimental.

Plants require nitrate, phosphate, and potassium to survive, as well as micronutrients including boron, zinc, manganese, iron, copper, molybdenum, and chlorine. Houseplants do not have access to these nutrients unless they are fertilized regularly.[35]

House plants are generally planted in pots that have drainage holes, to reduce the likelihood of over-watering and standing water. Pots are typically broken down into two groups: porous and non-porous. Porous pots (usually terracotta) provide better aeration as air passes laterally through the sides of the pot. Non-porous pots such as glazed or plastic pots tend to hold moisture longer and restrict airflow.

Houseplants experience a range of pests. Fungus gnats, spider mites, mealybugs, thrips and scale are common pests.

Alternative growing methods

Houseplants are also grown in a variety of media other than potting mix, often in a hydroponic or semi-hydroponic system. This may overlap with aquascaping. Materials like sand, gravel, brick, expanded clay aggregate and styrofoam may be employed.[citation needed]

Some epiphytic plants may be grown mounted, either with their roots in potting mix and their stems attached to supports, or with their roots wrapped in sphagnum moss and attached to a vertical surface with wire. This can also overlap with the practice of kokedama.

Production

Houseplants are obtained either by collecting wild specimens of plants, or by growing them in greenhouses or commercial nurseries.

Wild collection of plants for the houseplant trade is a major threat to many species, especially plants with limited native ranges. Plants which are particularly threatened in this way are cacti, succulents, and carnivorous plants, especially Venus flytraps.[36][37]

Plants grown for commercial production may be produced from seed, by using traditional propagation techniques, or through tissue culture. In 2002, the wholesale value of foliage plants grown in the United States was roughly 700 million dollars, mostly grown in Florida.[38] In 2018, houseplant growers in the Netherlands produced a billion houseplants for the European market.[39]

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