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If you have a gorgeous landscape set up with olive trees in pots at your front door or backyard and you would like to keep it outdoors through the winter, then you must ensure to protect your olive tree in winter.
Though, your olive trees in pots winter care can be challenging due to many winter freeze factors. But following our guidelines in this article, you will enjoy growing olive trees in pots or the ground rewarding experience.
- Can Olive Trees Grow in Cold Climates?
- Olive Tree Cold Resistance
- How to Protect Potted Olive Trees in Winter Outdoors?
- 1. Protect roots by selecting the rigth place
- Group potted plants togerther
- 2. Choosing as large containers as possible
- 3. Prepare for extreme weather
- 4. Water to protect the roots from damage
- 5. Feed the mature olive tree if older foliage begins to change color
- 6. Do not prune your potted olive tree in winter
- 7. Watch your olive tree for any pests or diseases
- 8. String small outdoor holiday lights throughout the olive tree’s branches
- Q&A – Olive Trees in Pots Winter Care
- Things You Will Need for Winter Care
- Final Thoughts on Potted Olive Tree Winter Care
Can Olive Trees Grow in Cold Climates?
The simple answer is yes! The coldest climate areas where mature olive trees can survive are with temperatures down to 15° F (- 9°C) for a limited amount of time during winter. However, the air must be dry with a cold hit gradually.
Therefore, a sustained freeze below 15° F (- 9°C) for olive trees can be fatal, and should think about moving olive trees indoors.
Olive Tree Cold Resistance
The main problem why an olive tree may not overwinter in a container or pot is lower root resistance to the frost. Roots are partially protected when planted in the ground but often freeze when planted in a container.
Frost resistance of the surface roots, old roots, and young roots can vary significantly. For example, perennial branches and stems of an olive tree can be resistant up to 5° F (- 15°C), old roots up to 15° F (- 9°C) and young roots only 23° F (- 5°C). After planting the olive tree in a container, the young roots are usually near the wall of the container and may freeze very quickly. So it is better to plant an olive tree in a container as early as possible, not just before winter so that its roots can establish and prepare for winter.
Also, the roots of the olive tree can be damaged if the walls of the container are highly conductive to heat, the container is over-watered or over-dried, and so on.
How to Protect Potted Olive Trees in Winter Outdoors?
So firstly, your outdoor conditions need to fulfill a few mandatory requirements for you to keep potted olive trees outside:
- The temperature cannot fall below the surviving level, i.e. 15° F (- 9°C)
- The tree gets enough sun throughout the winter, ideally a minimum of 6 hours of sunlight per day
- You regularly maintain and care for your olive tree in a container or pot
In order to learn how to care for olive trees in pots in winter I have brought together useful tips based on my own gardener’s and farmer’s experience:
1. Protect roots by selecting the rigth place
If there is a possibility you should place olive trees in containers or pots on the soil instead of tiles or pavement made from concrete or wood. This provides better insulation and prevents significant temperature fluctuations during the day-night cycle and better protects roots in containers. For instance, the winter sun can warm pavement during the day, setting the roots up for substantial damage when temperatures drop below freezing at night.
Group potted plants togerther
You can push the containers of outdoor plants you have in one location where they are sheltered by the wall. lace the hardiest plants on the outside and cover the outer containers with bark mulch in order to keep thermal insulation properties.
Otherwise, individual containers can be insulated using wire mesh and any thermal insulation materials before winter (a gap of 2 – 4 inches (= 5 -10 cm) is made between the mesh and the container, which is filled with thermal insulation material).
2. Choosing as large containers as possible
A capacity of tens of liters of the container will always be better than a few liters. Choose containers with thick walls (at least 1.2 in (= 3 cm) wide).
It is advisable not to choose ceramic or other porous-walled containers for overwintering outdoors. But if you choose them, they must be glazed or otherwise protected from water entering the pores of the walls.
Wooden, concrete, and metal containers are suitable for use during winter. Plastic containers are not durable and can crumble after a few winters. Drainage should be provided at the bottom of the container to prevent the soil from getting wet and freezing in ice during the winter.
Prior to planting an olive tree into a rectangular container, it can be insulated from the inside by inserting foam sheets against the walls and bottom. But it is necessary to make drainage at the bottom.
3. Prepare for extreme weather
After reporting extremely low temperatures, the olive trees in the containers can be wrapped in winter garden cover or plant cover, which should be removed when the temperature rises in order to stop the early swelling of the buds. This is a great option for overwintering and protecting olive trees from deep freezes.
4. Water to protect the roots from damage
Outdoor olive trees in pots regular watering help to protect the roots. Because moist soil freezes but will not harm and damage the roots. Absolutely, a healthy and strong olive tree is better prepared to deal with cold winter conditions than a dry, water-stressed plant.
5. Feed the mature olive tree if older foliage begins to change color
If older foliage begins to lighten in a color that means your potted olive tree lacks nitrogen. For this reason, the best solution is to use a balanced olive tree fertilizer with micronutrients. However, there is no need to fertilize the olive tree as long as leaves remain bright medium-green.
As well, do not feed outdoor olive trees under 2 years old during the winter months. Because young trees are more vulnerable to cold damage from foliage flushes than older specimens are.
6. Do not prune your potted olive tree in winter
This is a very common mistake by beginner gardeners. They try to clip winter-damaged vegetation and harm the tree even more due to frost affecting the cuts. To avoid it, put off intense pruning until after the last predicted frost for your area.
Actually, the better is to plan pruning in early spring, just after new growth comes out. In that case, you will be able to assess frost damage to your olive tree and what needs to be pruned off more accurately.
7. Watch your olive tree for any pests or diseases
Pests such as scale or aphids may attack outdoor olive trees in pots’ foliage during the winter. The easiest way to get rid of them is to knock them off with a strong spray from the garden hose. Or you can treat the olive tree with insecticidal soap as needed. For repeat applications follow the packaging instructions and our in-depth guidelines on scale insect removal.
8. String small outdoor holiday lights throughout the olive tree’s branches
This is another good piece of advice for your olive trees in pots winter care. absolutely, outdoor holiday lights not only give a charm to your landscape in the backyard but as well keeps your tree warm before the frost hits.
Q&A – Olive Trees in Pots Winter Care
In addition, let’s look at are the most common questions I receive with regards to olive trees in pots winter care:
Should You Cover Olive Tree in Winter?
If you live in an area that can be harshly hit by the frost, always wrap the trunk of your potted olive tree in several layers of cardboard to insulate it against frost. Cover the trunk from just below the main limbs and a pot together. You can secure the cardboard with duct tape. Leave the cover in place until the last frost will pass your region.
Do Olive Trees Lose Their Leaves in Winter?
No, olive trees are evergreen trees. However, you may notice olive trees dropping more leaves in winter than in other seasons. Especially, after the first hard frost, the olive tree may lose a bunch of leaves that helps the process for winter protection. As well, most leaves are dropping because the olive trees are renewing their leaves prior to a new growth season in the spring.
How Often Should You Water Potted Olive Trees in Winter?
For the winter season, give young olive trees about 1 inch (= 2.5 cm) of water weekly from November through February in the absence of rainfall. Bear in mind the potted olive trees must be watered more often than in-ground trees.
Supply more mature trees 1 to 2 inches (= 2.5 – 5 cm) weekly from September through February if there is no rain.
However if your area is constantly hit by the rainfall, skip the watering routine up until the olive tree gets dryer. You can check the soil moisture with a moisture meter which gives a good indication of when to water a potted tree.
Follow our detailed guidelines on how to use and read a moisture meter for olive trees.
Things You Will Need for Winter Care
Certainly, you don’t need any fancy gardening tools to have to take care of your olive tree over the winter. However, if you have the following customer highly rated items, available on Amazon, you can be sure your olive tree gets all the maintenance it needs in terms of watering, feeding, and pest control.
Last update on 2021-11-25 / Affiliate links / Images from Amazon Product Advertising API
Last update on 2021-11-25 / Affiliate links / Images from Amazon Product Advertising API
Final Thoughts on Potted Olive Tree Winter Care
In case you grow herb plants or small flowers next to your olive tree in a pot, don’t forget to look after these companion plants for your olive tree. If it is an annual plant, just cut it off until the roots and let it stay through winter dormant.
Otherwise, you should follow our guidelines above and ensure proper olive trees in pots winter care if you want to grow potted olive trees in your background or at the front door during winter. Following the steps in this article, you will save time and energy to look after your trees and won’t need to recover affected olive trees by the winter frost.
If in doubt whether the olive tree is sufficiently resistant to frost – it is best to remove it from the pot or container, prepare the soil, and plant it in the ground before the winter.
Have you had success growing an olive tree outdoors in winter? Comment us your results and share your best tips with us on olive trees in pots winter care. Happy winter growing!
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