What to do when the leaves of Cuban oregano turn yellow? The latest solutions

Cuban oregano (Plectranthus amboinicus) is a shrubby herbaceous plant of the genus Plectranthus in the mint family (Lamiaceae), native to regions such as the Cape of Good Hope in Africa. It is very suitable for potted ornamental display, and its scent is refreshing. It is best placed in a high spot or hung indoors, and can also serve as an accent piece on a table or desk. Its leaves make a wonderfully fragrant tea or wine, and can also be used in cooking, soups, stir-fries, and cold dishes. Now let us take a look at what to do when the leaves of Cuban oregano turn yellow!

Improper lighting

[Cause] Cuban oregano likes sunlight; only in a sunny environment will its succulent leaves be thick. With insufficient light the leaves become flat and thin, and too high a temperature can also cause the leaves of Cuban oregano to turn yellow.

[Solution] Cuban oregano should be placed where the light duration is appropriate, and at the same time light exposure should be appropriately increased or reduced according to the temperature.

Improper watering

[Cause] Cuban oregano is not tolerant of waterlogging; too much water easily causes root rot, and root rot will cause the leaves of Cuban oregano to turn yellow.

[Solution] The soil for growing Cuban oregano should be allowed to dry out and then be watered thoroughly. On cloudy days, watering and fertilizing should be reduced or stopped. After summer, watering must be reduced, and in winter watering must be controlled even more.

Too much fertilizer

[Cause] Although the soil in a potted Cuban oregano is limited and its fertility is insufficient, do not give too much fertilizer at once; excessive fertilization can also cause the leaves to turn yellow.

[Solution] When fertilizing Cuban oregano, follow the principle of light but frequent feeding, that is, give just a little fertilizer each time, and fertilize again a few days later.

Improper ventilation

[Cause] Cuban oregano is often grown in a greenhouse year-round and requires fresh, circulating air; otherwise it is prone to scale insect damage, which in turn causes the leaves to turn yellow.

[Solution] Cuban oregano should be grown in a well-ventilated location.

Normal situation

[Cause] When Cuban oregano has been grown for a long time, the lowest part of the stem will gradually become woody, which will also cause the surrounding leaves to turn yellow and then wither.

[Solution] The yellowing of the leaves of Cuban oregano in this situation is normal; just care for it as usual.