Hostas are plants for shade, but there are many varieties that can tolerate direct sunlight for several hours a day. In the southern states, these plants can be burned in extreme sun or drought.
To Hosta leaf scorch can be fixed by giving them shade, more water and a lot of moisture.
Read More: how to fix hosta scorch
I will then explain how to avoid scorch. We’ll also examine other possible causes.
Give enough water
If you notice traces of scorch on the leaves of your plant, then the first thing to do is to water it well.
Give enough water to soak the soil to its full depth and at least 2 feet in diameter. Try not to make a swamp. To To achieve this, water the bush two to three times per hour with small amounts of water.
According to the size of your bush, the total water required should not exceed 1-2 gallons.
I recommend that you wait until the evening to water your plants before you start watering. Because the heat causes most of the water to evaporate and the roots are not affected, it’s not worth the effort to water plants in the heat.
In the future, you need to keep the soil around the plant from drying out. It should be kept moist but not too dry.
You can water it every day if you feel the need. The soil can dry out quickly in drought conditions.
Watering alone will not fix the problem. Leaves can still burn even after enough water is given.
Provide more shade
The main cause of scorching leaves is an excess of direct sunlight.
Although some varieties can withstand hours of direct sun, others are not as resilient.
The sun is stronger in the south in Hardiness zones 8-8 than in 3 or 4. Hostas may experience different conditions depending on where they are planted.
You should provide shade for your plants if they become scorched. Shade them is the best way to do this.
If there isn’t enough shade, I put a frame around the hostas, and then cover it with a shade net. These can be purchased at almost all garden centers. I recommend using a grid that reflects at least 50% of the sun’s rays.
As a frame, you can use four sticks. You can simply insert the sticks into the ground around your plant as pillars, and then add a net to the top.
An ordinary garden umbrella can be used. Place it over the hosta on the south side, and you’re done.
When the leaves are gone, you can take out the shade and put the plant in dormancy.
The two previous tips can only be a temporary solution. If your hostas continue to scorch, it is best to transplant them in full shade. So let’s talk a little bit about how to move them properly.
Time is the most important factor when transplanting. Because of the favorable conditions for changing the location, I recommend that you transplant in the middle of spring or early autumn.
Hosta In summer, when it is hot and there is no rain, leaves can scorch. It is better to stop transplanting them at this point.
After the summer is over, water your plants, shade them, and then transplant when autumn arrives.
Different climates have different best times. It will fall between late August and early September in the Northern United States. It will be the second half September for South Zones 7-8.
You should allow yourself 35-40 days to transplant before the first frosts.
You should choose a cloudy day to move your hostas. Avoid sunny days. The plants should be watered well before they are transplanted.
Because hostas cannot tolerate direct sunlight, it is important that the new location be in full shade. Best is the north side of your house or fence.
You should carefully dig the root ball, taking care not to damage any parts of the plant.
Dig a hole twice as large as the rhizome that you are moving to a new location. You will need to mix quality compost with garden soil (half-and-half). Fill the hole with 50% of garden soil and quality compost.
The rhizome should be placed in a new location so that the stems do not get covered with soil. This means that the hosta should remain at the same height level as before.
Fill the empty spaces with earth, and then add a bit of water. The water will eventually drain and the earth will settle slightly. Add more soil, and then water it again.
You will need to water the soil again until the plant roots. Do not overwater. Just check how deep the soil has dried; if more than half an inch, then it’s time to water your hostas.
I also wrote a detailed article on How and when it is best to transplant hostas. You can avoid making common mistakes in transplantation by reading this article.
Do I need to cut the scorched hosta leaf?
The scorched leaves can still be beneficial to the hosta plant, so you shouldn’t cut them. Sometimes, however, it is better to just delete them.
Let’s talk about this in more detail.
The edges and tips of the leaves often become scorched. The leaf should only be damaged by 10-15%. You don’t need to cut the leaf in this instance.
Even partially damaged leaves will photosynthesise during the growing season. The plant will then receive energy to grow.
The amount of energy the hosta has will drop if you remove all scorched leaves. It is best to not trim it if there are minimal damage.
If the leaves are too burned, however, there may be diseases that form from the dead tissue. To avoid any problems, it is best to remove the entire leaf.
I recommend cutting at the point where the leaf connects to the stem or slightly below (1-2 inches) because the stems can also replicate the sun’s rays into energy for the plant.
The rhizome can be damaged if the stems are cut above the ground. This will prevent rot.
When pruning, use only sharp, sterilized tools.
How To prevent hosta scorch
Negative effects can be caused by disregarding cultivation rules. This means that you will have to rectify your mistakes and do additional work.
Next, we will discuss how to properly care for hostas so they do not burn.
Plant sun tolerant hostas
There are many varieties of hostas on the market that sellers claim can grow in the sun. It is important to remember that this claim may not be true all the time.
While many varieties can survive exposure to sunlight, they will not look their best. Their leaves will turn pale green-yellow even if they are not burnt.
Varieties with yellow or white stripes on the leaves usually grow better in the sun. These varieties will also be less visible in full shade.
The most sun-resistant varieties include:
- Sum and Substance
- Gold Standard
- Sun Power
- and others.
Although some hostas are tolerant to full sun, this does not mean they can be grown in open areas where they receive more than 10 hours of direct sunlight.
Plant them in a place that is shaded from the sun at midday and gets no more than 4-5 hours direct sunlight. It can take up to 6 hours for the northern United States.
Hostas should not be grown in direct sunlight if they are in hardiness zone 8, 7 or 8. You can do this for a while and they will be fine. But, in the hot summer heat, they can become scorched.
Blue hostas should never be planted in direct sunlight. Such varieties require deep shade for a deep blue color. They will become pale gray with a very little sun.
The soil must hold water
The next thing you can do to reduce the likelihood of damaging your hosta is to make the ground hold water better.
Consider a yard with sandy soil, or soil that dries quickly in summer heat. You will get baked hostas if you add direct sunlight.
To To improve soil quality, you will need components that can store more water. You have two options when it comes to adding organic matter (compost).
You will also get another benefit if you add compost to your soil. Your plants will be healthier. As a result, you don’t have to fertilize them too much.
You may find that the compost content in the mixture is higher (30-40%).
It is important to use good compost, which has been prepared with the right technology.
Water hostas properly
I have already written about watering above, but I want to say a few more words about it.
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The problem of scorching leaves cannot be solved by watering only. If you give your hosta enough moisture, it will be less likely to suffer from sunburn.
The soil should not dry out by more than half an inches around the plant. The soil should not remain wet.
The top layer of soil in southern states can dry out during summer heat. This means that you may need to water your plants daily.
The size of the bush will determine the amount of water needed. One gallon will be enough for small and medium-sized plants. Two to four gallons will be required for large or giant plants.
Drip irrigation is a better option than daily watering. Just bring water to each bush, and that’s it.
An automatic watering system can be installed with a rain sensor. You don’t have to worry about watering in this situation.
It is important to properly configure the controller to prevent overwatering.
You can mulch the surface to prevent it from drying out quickly. This is especially useful for hostas.
Mulch also has the advantage that it doesn’t heat up as much. The mulch will keep the plants cool in summer heat.
Pine bark and compost are the two best mulches to use for the hosta.
Compost will improve the quality of the soil surrounding the hosta. This material does have its limitations.
The first is that it does not create any obstacles for the growth of weeds. You will need to weed the flowerbeds from time to time.
The second life expectancy of compost mulch is lower than that of other types.
Bark is second in mulching options. Bark is the best mulch material. It almost doesn’t add nutrients to the soil.
Mulch can be used in many different ways. You can read my article 4 Best Mulch for Hostas to learn more about these mulching materials and how to properly mulch hostas.
Hosta leaf scorch in fall
Very often, people wonder why the leaves of hostas scorch in the fall.
This is because the end comes and the leaves slowly begin to die.
Different species and varieties have different methods of dying their leaves.
Some varieties die instantly, while others turn yellow and dry completely.
Some varieties burn at the edges. Sometimes, large yellow spots can be seen in the middle of the leaf. The leaves lose their color, but they do not completely die. They continue to be fed until the first frosts.
You don’t need to do anything about it. Although the leaves might not look very attractive, if they are still partially green, it is okay.
It is not necessary to take out all the leaves. When the frosts come, and all the foliage fades, then it’s time to remove it.
After the stems have dried, wait a couple of weeks until they come off the rhizome. Then remove them.
To prevent rot, do not leave any plant debris close to the hosta.
Can diseases cause scorch?
Some fungal diseases can cause severe damage to the hosta. This causes spots on the leaves and darkens the leaf.
Most often, infection occurs in humid and cloudy weather. This is also caused by densely planted bushes.
If you notice that your hosta is growing in shade and the leaves seem to be scorched, it’s worth looking closer for spores of the fungal infection. If you have any suspicions, it is best to protect your plants.
It is important to immediately remove damaged leaves. For this, you will need to use sterile instruments.
Spray the plants with an aqueous solution. You can spray the plants with a variety of fungicides.