Rosemary wants direct daylight, doesn’t like moist ft
A number of weeks in the past, my sister purchased a rosemary plant. It was rising nicely till not too long ago, when the leaves started to show black. I water it as soon as each three days. The plant is refrained from direct daylight. What’s the drawback?
Elena Chan
Your rosemary plant (Salvia rosmarinus) doubtless lacks daylight and has moist ft. To develop rosemary crops nicely, they want a minimum of 4 hours of direct daylight. Enable the rising medium to dry out barely earlier than watering once more.
An absence of daylight worsens a plant’s well being and makes it extra susceptible to illnesses. Many of the rosemary crops offered regionally are imported and produced in coco peat rising media, which may retain plenty of moisture.
An absence of daylight additionally reduces the necessity for the plant to take up water and slows the speed of evaporation. Because of this, the plant experiences fixed moist ft, which may trigger the roots to die and the plant to be contaminated by soil-borne illness.
Curry Tree infested with mealy bugs
My curry leaf plant appears to be rising fantastically, however there’s a white development on it. Is that this one thing to fret about?
Paul Raymond
Your curry tree (Murraya koenigii) is badly infested with quite a few mealy bugs, that are sap-sucking pests.
Use a tender toothbrush to take away them. Then apply summer time oil, which is an environmentally pleasant pesticide generally offered in native nurseries, to handle the remaining pests. Summer season oil removes the white wax discovered on the mealy bugs and suffocates them.
You want thorough pesticide protection on all elements of the plant. Repeated purposes could also be wanted to eradicate all subsequent generations of the pests.
Cash plant might have been overfertilised or contaminated with illness
The leaves of my cash plant, which is grown indoors, are turning yellowish with black edges. What’s the trigger and what can I do to save lots of the plant?
Wong Kai Sang
The black edges on the leaves of the cash plant (Epipremnum aureum) may very well be as a result of a number of causes.
Did you lately apply fertiliser on the leaves? Extreme fertiliser may cause the leaves to burn. Flush away the fertiliser with water to scale back additional harm to the plant.
One other doable purpose for the black edges is an absence of water. The cash plant wants a moist rising medium. It shouldn’t be allowed to dry out and wilt. Excessive moisture stress can harm the plant.
Lastly, be sure that the plant is grown underneath optimum situations – specifically, filtered daylight for about 4 to 6 hours each day with good air circulation.
Unhealthy crops are susceptible to illness and an infection if they’re grown in a moist space with low gentle and poor circulation.
Eggplant might lack potassium
Why do the leaves of my eggplant have yellow edges? A few of them look burnt. What can I do to resolve the problem?
Lee Bee Wah
Your brinjal plant (Solanum melongena) appears to lack potassium. Potassium deficiency is a plant dysfunction that begins in older leaves and regularly progresses to youthful leaves. The leaf edge turns yellow, resulting in interveinal scorching and necrosis from the leaf’s edge to the midrib as deficiency progresses. The yellowing – or chlorosis – is irreversible even when the plant receives potassium.
This challenge is widespread if the plant is grown in well-drained soil, as water-soluble potassium ions are simply leached from rising media.
To assist the retention of potassium, add natural matter to your plant’s rising medium. Feeding crops with a fertiliser that has extra potassium and accommodates magnesium (larger Ok ratio with magnesium oxide or MgO, as indicated on the product label) might help to scale back the probability of the problem recurring.
Fruit of the Ambay pumpwood not generally eaten in Singapore
I noticed this large-leafed plant in an previous housing property. What’s it and the way large will it develop? Is it a fruit-bearing tree and are the fruit edible?
Phang Jenny
The plant is usually referred to as Ambay pumpwood and its botanical title is Cecropia pachystachya. This one remains to be a younger plant, however it may develop into a big tree greater than 10m excessive.
It’s thought of an unique, undesirable plant species that may be present in sunny websites on the edges of forests or open wastelands.
The timber are dioecious, which means that every tree bears both male or feminine flowers. You want each sexes to be planted in your backyard to supply fruit.
The quite a few small fruit, produced in bunches, are reported to be eaten in its native vary in South America, however aren’t usually consumed in Singapore.
- Solutions by Dr Wilson Wong, an NParks-certified practising horticulturist, parks supervisor and ISA-certified arborist. He’s the founding father of Inexperienced Tradition Singapore and an adjunct assistant professor (Meals Science & Expertise) on the Nationwide College of Singapore.
- Have a gardening question? E-mail it with clear, high-resolution photos of a minimum of 1MB, if any, and your full title to stlife@sph.com.sg. We reserve the best to edit and reject questions.
