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Never allow a Pilea to endure strong sunlight all day as it'll lead to dehydration and veiny yellowed leaves. A location that offers bright, indirect sunlight with a small amounts of off-peak direct sunlight is highly recommended over the autumn and winter months. Remember - the amount of light and current season of the year will directly govern the frequencies of waters per month. Specimens placed in darker areas must be kept on the drier side to life, whereas brighter locations will require more soil moisture to lubricate photosynthesis.
Allow the top third of the soil dry out in between irrigations, reducing this further in the autumn and winter to replicate their dormancy period. As their root systems are sensitive to temperature change, never apply cold water to avert weakening the plant's overall health. Under-watering symptoms include a loss of lower leaves, the yellowing or browning of foliage, deformed and stunted new growth. Over-watering symptoms include yellowed lower leaves, the curling of foliage and little to no growth. If your Pilea is losing its lower leaves quickly, root rot could be an issue, especially with those situated in dark locations. Click on this link to learn more about root rot and how to address it.
Average room humidity is enough to occupy a Pilea, however, introduce a humidity tray whilst the radiators are operating to counteract the dry air.
While using a 'Houseplant' labelled fertiliser, feed your plant once every four waters in the spring and summer before reducing this to every six in the colder months. Never directly apply a 'ready to pour' feed into the soil without a pre-water beforehand, as it may cause chemical root burn. Do not over-fertilise.
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Green curling leaves symbolise over-watering, typically sped-up by too dark locations. Although root rot isn't overly common with Pilea, allow the top third of the soil to dry out in between irrigations to reduce the chance of this happening.
Too much sunlight will cause its leaves to yellow and curl over with elongated veins (pictured below). They'll never thrive in too much sun, so relocate your Pilea to a slightly darker location that offers a good level of indirect light. In some cases, its foliage may turn purple or red which is a common issue over the summer months when the sun is at its most sharpest.
If the lower half of the leaves start to yellow and drop off, it could be due to either too little light, over-watering or poor air circulation which commonly all go hand in hand. Unfavourable growing conditions that aren't corrected will cause further damage to your Pilea and may spell the end of juvenile (pups) growth.
Rotting 'pups' is commonly down to too little light or over-watering. Although this may spell the end for less sturdy pups, new stem and rhizomatous growths will appear once the growing conditions are improved. Its rootball may need to be inspected for root rot; click here to learn about root rot.
Failed cuttings propagated via water or soil - There are several reasons why the cuttings haven't rooted well, with the first being the time of year. Pilea are best propagated during the spring, but can still be successfully propagated throughout the year.
The second reason could be the cultivation environment - is there enough light to read a newspaper? If not, improve the growing conditions by increasing the amount of indirect light, avoiding the threat of excessive direct sunlight.
Moreover, the size of the cutting will play a big part in its success; smaller specimens (3cm in length or less) won't root correctly due to the lower amounts of stored energy, and therefore may breakdown or root in inappropriate locations.
The water must also be replaced weekly to ensure nasty pathogens cannot breed and decay on the cuttings. If the bottom of the stem is brown and mushy, discard immediately as the rot will spread onto unaffected specimens
Maintaining too dry soil or over-exposure to the sun will also prove unsuccessful for those that haven't acclimatised to the drier environment. Although water-logging must be avoided at all costs, be sure to maintain moist soil throughout the rooting development (the initial two months) to quicken the process of establishment. To escape falling in the trap of dehydration, wrap the cutting and its pot in a transparent bag for the first couple of weeks. As there'll be a poor root system to soak-up vital water, its leaves will be able to absorb the excess moisture trapped within the bag for hydration.
Small white dots that develop on the leaves' undersides are nothing to worry about and are the result of an imbalance of moisture between the leaves and roots. Although harmless, it's recommended to ease off with the waters slightly as the roots have absorbed too much water that can be transpired through the leaves. This process is called Oedema, and can affect many forms of succulents.
Although many believe that the species was brought back by Norwegian missionary, Agnar Espegren, from the Yunnan Province of southern China, it was in fact, Scottish explorer George Forrest who discovered the plant back in 1906 within the same region. Amateur botanists propagated Pilea without a formal binomial classification until the late 1980s, which is when the species was finally placed in the nettle family, Urticaceae. In the Chinese provinces of Yunnan and Sichuan, P. peperomioides naturally grow on damp rocks located in the nearby forests, but has recently become endangered due to a decline in numbers.
12° - 24°C (54° - 75°F)
H1b (Hardiness Zone 12) - Can be grown outdoors during the summer in a sheltered location with temperatures above 12℃ (54℉), but is fine to remain indoors, too. If you decide to bring this plant outdoors, don't allow it to endure more than an hour of direct sunlight a day as it may result in sun-scorch. Regularly keep an eye out for pests, especially when re-introducing it back indoors.
Up to 0.4m in both height and width. The ultimate height will take between 5 - 10 years to achieve, with up to 6cm of stem growth being developed per season.
Remove yellow or dying leaves, and plant debris to encourage better-growing conditions. While pruning, always use clean scissors or shears to reduce the chance of bacterial and fungal diseases. Never cut through yellowed tissue as this may cause further damage in the likes of diseases or bacterial infections. Remember to make clean incisions as too-damaged wounds may shock the plant, causing weakened growth and a decline in health.
Via Seed, Stem Cuttings & 'Pup' (Basal Offests) Division.
Stem Cuttings (Easy) - During the spring, slice back your Pilea shaft to promote bushier growth and more 'pups'. The best way to take stem cuttings is by using a clean pair of scissors and cutting off the top 8cm (3 inches) of stem. Immediately place the bottom half in lukewarm water for root development, providing a bright indirect setting for quicker growth. Small white roots should appear within a few days of propagation, and once they're 3cm (1.1 inches) in length, it can be potted up. 'Houseplant' compost is best, or you can make your own via using multipurpose compost with grit or perlite. Follow the care tips provided at the top of the article.
Pup (Basal Offset) Division (Very Easy) - Once the individual pups are around 5cm (2 inches) in length accompanied by a few healthy leaves, propagation can begin. Take the plant out of its pot and place your fingers in between the two plants; soil may have to be removed to get a better grip. While placing your hand close to the nodal junction, gently push the pup downwards, supporting the surrounding soil and mother plant. You should hear a snap. Cautiously separate the two roots systems, keeping great empathise in keeping them intact and damage-free. Immediately place the bottom half in lukewarm water for root development, providing a bright indirect setting for quicker growth. Small white roots should appear within a few days of propagation, and once they're 3cm (1.1 inches) in length, it can be potted up. Place the new plantlet in a well-draining potting mix, much similar to the original soil, and maintain the same care routines. 'Houseplant' compost is best, or you can make your own via using multipurpose compost with grit or perlite. Do NOT over-pot the new pup, as a ratio of roots-soil that leans towards the latter will cause root rot and inevitable death. Pups that are too small, or overly damaged will not root appropriately and therefore may rot. Follow the care tips provided at the top of the article, avoiding nearby radiators, prolonged droughts and direct sunlight for the first couple of months.
Small clusters of white flowers will appear midway down the stem and can last up to several days. This process usually gets underway in late spring, but some specimens can flower before, or after this time bracket. Although Pilea will bloom each year, the show is almost uninspiring and is often removed by horticulturalists so that the plant focuses its energy onto the foliage.
Repot every two years in the spring, using a 'Houseplant' labelled potting mix and the next sized pot with adequate drainage. Hydrate the plant 24hrs before the tinkering with the roots to prevent the risk of transplant shock. For those that are situated in a darker location, add a thin layer of small grit in the pot's base to improve drainage and downplay over-watering. Click here for a detailed step-by-step guide on transplantation, or via this link to learn about repotting with root rot.
Keep an eye out for aphids, spider mites, mealybugs & scale. Common diseases associated with Pilea are root or stem rot, leaf-spot disease, powdery mildew and botrytis (grey mould) - click here for more information about how to identify and address any of these diseases.
This plant is classified as poisonous, so if small sections are eaten, vomiting, nausea and a loss of appetite may occur. Consumption of large quantities must be dealt with quickly; acquire medical assistance for further information.
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