Jasmine


Top Tips

  • Keep the soil evenly moist whilst in flower, using lukewarm water.
  • Average room humidity is more than acceptable for a Jasmine - do not situate it within three metres of an operating heat source.
  • Bright, indirect light is best - avoid direct sunlight and excessively dark locations for best results.
  • Supplement fortnightly using a potassium-based feed whilst in bloom, reverting back to a general plant fertiliser at monthly intervals, soon after.
  • Scroll down to the 'Dormancy Care' section to learn about annualising blooms.

∙Water - 🔸🔸🔸

Jasmine won't tolerate persistent droughts, especially whilst in bloom. Once the top third of the soil has dried out, rehydrate by using the bottom-up method to reduce the chance of fungal diseases associated with excess moisture on the foliage. Submerge the bottom fifth of the pot in a saucer of water until thorough absorption. Repeat this step weekly, especially with those grown in bright, warmer locations. Whilst the plant is in bloom, it's important not to use cold water as this will quickly shock the roots, causing multiple issues down the line. Under-watering symptoms include rapid flower loss and dry, sunken leaves; these issues are usually due to either forgetfulness, too much sunlight or too much heat. Over-watering symptoms include rotting lower leaves, yellowing leaves, a loss of buds or flowers, and root rot. Allow the majority of the soil to dry out in between waters, preventing a pool of standing water to accumulate beneath the pot.


∙Humidity - 🔸🔸

Average room humidity is more than enough to occupy a Jasmine, as too high humidity and poor air circulation will result in powdery mildew. Do not mist the flowers as this will cause botrytis petal blight that can spread quickly if not dealt with accordingly.


∙Location & Light - 🔸🔸🔸

A location with little to no morning or evening sun is the ideal setting for this species. Never situate a Jasmine in a dark location, due to the heightened chance of root rot and a lack of flowers. If you're worried about its location being too dark, if a newspaper can be read while having your back towards the light source, you're good to go.

In terms of the ideal room around the house, as long as the desired location is above 15ºC (59ºF) and is at least four metres away from an operating heat source, it should be accepted by the Jasmine. Do not place the plant in more than a few hours of direct sunlight as irreversible damage may occur.


∙Fertilisation - 🔸🔸

Use a fertiliser high in potassium to prolong its flowers during the festive period - an excellent example would be a Tomato Feed. Regular fertilisers, for instance, BabyBio or Miracle-Gro, will still do the job but will favour foliar growth instead. For the rest of the year, a standard fertiliser can be used to supplement the plant, at monthly intervals.




Common Issues with Jasmine

Under-watering is the biggest issue when it comes to a Jasmine. Typical signs of this include wilting, sunken leaves, rapid flower or bud drop and stunted growth. Not only will you have to be mindful of persistent droughts, think about which plant parts to keep dry. Its foliage must also remain dry at all times to prevent the development of diseases and blights. Jasmines situated in direct sunlight or within four metres of a radiator are more likely to suffer from under-watering related issues.

Never situate a Jasmine within four metres of an operating heat source, for instance a radiator or fireplace. Due to the heightened temperature, the plant will soak up far more moisture than those situated in cooler locations, increasing the chance of droughts.

Too much sunlight will lead to sun scorch, with typical signs including browning or crispy leaves, dry leaf-edges, sunken leaves or stunted growth. Although too little light will cause over-watering issues, too much sunlight will be a detriment, too. If yours has fallen short of this, reduce the amount of sunlight considerably and always be mindful of environmental shock (when too locations offer too different growing conditions). Remove some of the affected leaves and increase waters slightly. Only hydrate the plant using the bottom-up method.

As mentioned before, powdery mildew and botrytis are major threats among heavy foliage plants due to the compact nature that aids the spread of the diseases. Watering above the foliage will allow excess moisture to sit in the cubbyholes of the stem, enticing harmful bacteria to thrive. Remove the affected areas and improve the growing conditions by situating the plant in a brighter location with the use of the bottom-up method of irrigation.

Sudden flower loss can be caused by an array of different issues, including an change in location, too little hydration, too hot or cold temperatures or droughts and pests. Whilst the plant is in bloom, keep the soil evenly moist, to hydrate the thirsty work of producing flowers. Locations that are outside of the recommended temperature bracket, or have drastic fluctuations must also be kept off the cards, as Jasmine can be very sensitive to the ambient warmth that they're situated in. Alternatively, a setting that offers similar temperatures all year round can inhibit blooms. They'll respond very well if the autumn and winter months are a couple of degrees cooler than in summer. This will not only winterise the plant, but it'll also force it into a dormancy period which is a crucial ingredient for successful flowers. The final issue could be to do with pests. Although it's highly unlikely that an infestation will cause a sudden change in health, have a quick inspection for vine weevils (located in the soil), spider miteaphids and mealybugs

A lack of flowers is caused by a insufficient dormancy period, served in the winter months. Locations that offer near-similar temperatures all year round won't allow the plant to go dormant, resulting in poor spring growth. To achieve, situate in a location that dips to around 12°C  (54°F) with fewer waters. Allow the majority of the compost to dry out and provide a humidity tray while the radiators are operating. While we're on the subject, if you'd like to prolong the flowering period, use a fertiliser high in potassium to promote longer lasting flowers; Tomato Food is an excellent choice. Other tips to extend this period are to avoid temperature fluctuations and droughts, maintain good humidity and place in a well-lit room with little to no direct sunlight.


Providing a taller trellis each time a Jasmine is repotted will promote better foliar and flower growth. Copyright: thesweetpetite.com


Dormancy Care & Annual Flowers

Trying to re-flower a Jasmine isn't the hardest of tasks, but those that have a cool room without artificial light at night will be on the upper-hand. Although indoor Jasmines aren't the same as the hardy species used in beds or borders, they'll both naturally flower at the start of spring.

Repotting isn't mandatory if you want it to re-bloom - in fact, this may hurt the chances. Only repot every two to three years and after the blooming has finished. To get it to re-flower at the start of the growing period, think back to its previous dormancy period served in the winter. The following steps should be done at the end of autumn, when the plant starts to slow its growth.


Sunlight & Summer

Be sure to provide a bright location with no direct sunlight. Although the sunlight won't necessarily hurt the plant, you can easily fall in the trap of under-watering, potentially weakening the plant. Place the plant outside in a semi-shaded location during the summer once the nighttime temperatures are above 12℃  (54℉). Not only will this allow the plant to soak up some natural rays, it'll increase the chance of bloom in the following spring. Bring the plant back indoors once the summer is over; always check for pests - most notably being Aphids that'll attack the new growth. In order for the Jasmine to fully become seasoned, avoid the use of artificial lighting during the winter nights.

Hydration

Reduce irrigations so that the majority of the soil becomes dry. Remember, Jasmines should only be watered from the bottom-up as rotting foliage are a common issue with cooler temperatures.

Occasional Feeds

While it's bloom, use a Tomato fertiliser to provide a nourishment of potassium. During the dormancy period, only supplement once or twice to carry it through until the following spring, using a general houseplant fertiliser. 

Reduce Everything

This one is to remind you that everything needs to be reduced - especially the temperature.

Temperature

This is the most significant step - reduce the temperature down by around 5℃ compared to the summertime or place in a room that's within 10 - 15℃  (50 - 59℉). Most houseplants are quite sensitive to ambient change, so we can't empathise how vital this step is! Do not exceed the minimum temperature for tender Jasmines as this could lead to plant death.




Origins

There aren't many differences between the outdoor, and indoor varieties. The latter, J. officinale, will flower during the start of spring that'll last up to six weeks and has pinnate foliar arrangements. The species was first described by Carl Linnaeus in the mid eighteenth century, and has natural distributions across Central Asia, from Kazakhstan to West China. The genus' name, Jasmine, is derived form the Arabic name, Yasmin, that refers to 'sweetly scented plants'.


Temperature

10°C - 25°C   (50° - 78°F)
H1c - can be grown outdoors in spring and summer in a sheltered location, but is fine to remain indoors. If you decide to bring this houseplant outdoors, do not allow it to endure more than an hour of direct sunlight a day as this will burn the leaves. Regularly keep an eye out for pests, especially when retrieving the plant back indoors. 

Jasmines thrive in cooler locations and will generally flower better if a good dormancy is served in winter when temperatures dip to around 12°C  (54°F).


Spread

Up to 1.2m in height and 1m in width when supported by a trellis. The ultimate height will take between 4 - 6 years to achieve.


Pruning

Remove yellowed or dying leaves and plant debris to encourage better growth and improve the all-round appearance. Pruning must be done with clean scissors or shears to reduce the chance of bacterial and fungal diseases; remember to make clean incisions as too much damage can shock the plant. Allow the flowers to fully elapse (usually at the end of spring) before pruning the foliage back a third, to promote a bushier appearance and new buds over the course of the year.


Propagation

 Via seed or stem cuttings. To learn about the critical essentials with sowing seeds, be sure to click on this link - Seed Propagation Tips

For stem cuttings, use shoots that have a soft, bendy wooded base that haven't flowered; this propagation method can be taken in mid-spring. They should be at least 8cm in length and are found in the outer edge of the plant where the new growth takes place. Remove the lower half of the leaves and place in a well-draining potting mix - Seed & Cuttings Compost is advised. While the plantlet is still young, avoid direct sunlight and water-logging and repot as necessary, once the roots have surpassed 3cm in length. This method can be quite difficult, so be sure to take a few cuttings with differing variables to see which suits your skills the best.


Flowers

Jasmines will flower at the start of spring, if grown correctly with a good dormancy served in the autumn and winter months. Each individual flower will last up to two weeks, with the overall show lasting up to eight weeks. Supplement the plant using a fertiliser high in potassium to prolong its flowers - Tomato feeds is an excellent choice. Never promote persistent droughts as this will shorten the duration of flowers.


Repotting

Repot every two or three years in the summer, using Houseplant compost with added perlite or grit. For matured specimens, introduce more grit to promote a stronger root ball as well as the reduction of potential root rot; click on this link for more information on how to perform the perfect transplant. Never repot whilst the plant is in bloom. Buy something that'll allow the Jasmine to climb up, for instance, a trellis. It's vital to follow this step as a specimen that has nothing to be supported by, generally won't flower as well.


Diseases & Pests

Common diseases with Jasmines are root or crown rot, powdery mildew, leaf-spot disease, botrytis petal blight and powdery mildew. Keep an eye out for spider mite, thrips, aphids & mealybugs. For more info on how to address any of these issues, hit this link.  Identifying Common Houseplant Pests & Diseases


Toxicity

Jasmines are considered not poisonous if consumed by pets and humans; however, if high quantities are eaten, it may result in vomiting, nausea and a loss of appetite.


Retail Locations

Some florists & Online Stores. Specimens are likely to be found in summer outside at most garden centres. A small selection of Jasmine are sold during Christmas, but generally don't last as long as those sold earlier in the year. It's not advised to bring outdoor specimens inside as this could lead to environmental shock or the introduction of foreign pests into the home.

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