Peperomia (Peperomia obtusifolia): How to Grow It, Key Points to Note, and How to Handle Tall Growth and Propagate It

Peperomia is also known as pepper elder and green-leaf jade. Its leaves are emerald green, it stays evergreen all year round, and its plant shape is attractive, making it an excellent indoor potted foliage flower. It is suitable for small and medium pots and is one of the ideal decorative flowers for the home. So what are the growing methods and key points to note for Peperomia? What should you do if it grows tall? How do you propagate it?

Introduction to Peperomia

Peperomia is a perennial herb with a plant height of 15-20 cm. It has no main stem. The leaves are clustered, the stem is somewhat thick and fleshy, and the leaves are obovate, grayish green mixed with dark green vein patterns. The spike inflorescence is grayish white. Cultivated types include the variegated-leaf type, whose fleshy leaves have a red tinge; the mosaic type, whose leaves are green in the middle with a broad golden-yellow border; the glossy-leaf type, with heart-shaped leaves and a metallic sheen. The curly-leaf type has deeply sunken leaf veins that form a wrinkled leaf surface, which is extremely interesting.

Growing Methods for Peperomia

1. Soil: Peperomia likes to grow in loose, fertile, well-drained sandy soil rich in humus, and is not suitable for growing in clay. Therefore, the substrate is usually a mix of leaf mold, river sand and a small amount of decomposed organic fertilizer. For a better substrate, peat soil mixed with perlite can be used for cultivation.

2. Watering: Peperomia is relatively fond of water and cannot tolerate drought. During the growing period, it should be watered frequently. When the temperature is above 25°C or the air is dry, water a little more, but also prevent waterlogging. When the temperature is below 25°C, water thoroughly again only when the surface of the potting soil is dry. When the temperature is below 10°C, it can tolerate several days of dryness without watering.

3. Humidity: Peperomia likes a moist growing environment. Under high-humidity conditions it grows luxuriantly and its leaf color is vivid. When the temperature is high or the air is dry, increase misting on the leaf surface or sprinkle water in the growing environment to maintain relatively high air humidity, which is extremely beneficial to plant growth. It can also adapt to a short period of dry environment, but not for long; generally it should be kept at around 70%.

4. Temperature: Peperomia likes a warm environment. The suitable growing temperature is between 20-30°C. The overwintering temperature is best kept above 10°C. Below 10°C it stops growing, and below 5°C it is prone to freezing damage.

5. Pruning: For newly propagated young seedlings, pinch out the growing tips when the seedlings are about 10 cm tall to increase the number of branches, so that the plant shape is fuller and has higher ornamental value. For large plants, pruning is generally determined by their growth condition.

Propagation Methods for Peperomia

Peperomia is mostly propagated and cultivated by cuttings and division.

1. Cuttings

In April—May, select healthy top branches about 5 cm long as cuttings, keep 1—2 leaves on the upper part, and after the cut end has dried, insert them into a moist sand bed. Leaf cuttings can also be used: cut off a leaf with its petiole with a knife, let it dry slightly, then insert it obliquely into the sand bed, and it will take root in 10-15 days. In a greenhouse with temperature control equipment, this can be done all year round.

2. Division

Mainly used for propagating colorful-leaf varieties. The potting soil can be made from leaf mold, peat soil plus some perlite or sand, with an appropriate amount of base fertilizer added. During the growing period, apply a topdressing once every half month. For watering, it is best to use water that has been left standing in a water tank for 1—2 days, and watering should be controlled in winter.

Notes:

Temperature changes directly affect leaf color. For colorful-leaf types, the suitable winter temperature is 18-20°C; for green-leaf species, it is about 15°C. They are afraid of heat in midsummer, so they can be placed under a shade shed and misted to cool down, but note that both excessive heat and excessive moisture can cause stems and leaves to turn black and rot. In winter, place them in a bright place; in summer, avoid direct sunlight. Repot once every 2—3 years.

Cutting substrate

This refers to materials such as nutrient soil, river sand, or peat soil used for cuttings. For home cuttings, it is difficult to obtain an ideal cutting substrate due to limited conditions. It is recommended to use a ready-mixed and sterilized cutting substrate; medium-coarse river sand can also be used, but it should be rinsed several times with clean water before use. Do not use sea sand or river sand from saline-alkali areas; they are not suitable for the growth of flowers and plants.

In early spring or late autumn (when the highest midday temperature does not exceed 28°C and the lowest nighttime temperature is not lower than 15°C), during the peak growing season, cut off leaves or stems (with 3-4 leaf nodes), wait for the wounds to dry, then insert them into the substrate, and lightly mist the cuttings and substrate. As long as the substrate is not excessively dry or waterlogged, they can quickly grow roots and new shoots. From late spring to early autumn, when temperatures are relatively high, cuttings rot very easily, so it is best not to take cuttings then.

Hydroponics and Soil Culture for Peperomia

1. How to grow hydroponically

Peperomia is an excellent model of a plant that is very easy to keep alive in hydroponics. With 4-5 leaves per plant, it is very easy to adapt to an aquatic environment, will not rot, and is easy to grow.

It likes a warm, humid, semi-shaded environment, cannot tolerate high temperatures, and avoids direct sunlight; it is drought-tolerant, so watering should not be excessive, especially in autumn and winter when watering should be reduced. If the air is dry, mist the leaves more. Avoid frost.

2. How to grow in soil

The cultivation substrate for Peperomia requires good air permeability and good water retention, such as an organic substrate like peat soil plus perlite or vermiculite, at a ratio of about 6:1. Avoid excessive moisture in the cultivation substrate; generally keep the cultivation substrate at 40-60% water content.

It is usually placed indoors in a bright spot or outdoors in a shaded area. The optimum temperature is 20-26°C, and the winter temperature should be above 5°C. Mist the leaves regularly to maintain relatively high air humidity. It can also be kept for a period and then lightly pruned or transplanted into a courtyard for ornamental display.

Key Points to Note When Growing Peperomia

Peperomia is relatively fond of water and cannot tolerate drought. Normally, watering should follow the principle of watering when dry and stopping when wet, and the potting soil must not be too dry. But at the same time as watering, also be careful to avoid standing water in the pot, as waterlogging can easily cause root rot and lead to plant disease. In winter at low temperatures, it depends on the situation: when the temperature is relatively low, water less; on sunny days, water appropriately more.

To avoid standing water in the pot, it is best to use a clay pot or ceramic pot with good air permeability when planting. Households with heating in winter should also frequently mist the leaves. While cleaning the leaves, appropriately increase humidity as well, so that Peperomia leaves can remain emerald green and bright. Peperomia does not have very high requirements for fertilizer and water. Apply a small amount of fertilizer in winter and summer, and in other seasons use diluted fertilizer water for irrigation. It is best to follow “light fertilizer applied frequently”, and avoid concentrated fertilizer or raw fertilizer.

What should you do if Peperomia grows tall?

If a plant not growing makes people worry, sometimes a plant growing too vigorously also makes people worry. Some flower lovers have asked what to do if Peperomia grows tall. In fact, the solution is very simple: cut it off.