When you initially place the plants outside, put them in a partial shade location with only a few hours of morning sun or afternoon sun for the first few days. Gradually increase the amount of direct sunlight they receive by moving the plants into full sun for a limited time, about 4-5 hours.
After 2-3 days of acclimating your plants and trees, and if the weather conditions are right, your new plants and trees are ready to be planted outdoors in a permanent location. Your new plants and trees should be able to manage conditions, as long as soil temperatures are expected to stay above 50ºF.
Keep them in a shady spot to give them a chance to recover: even plants that look terminally crispy can often revive and re-sprout with this treatment. Larger pots should be heavily watered, then allowed to drain – one deep watering is better than daily sprinkles.
If you have a new plant or are starting to expose a plant to sun during the warm part of the year, then you need to do it gradually. A few hours of morning sun at first, for a few days. Then a little more for a few more days. By 10-14 days it should be enough for the majority of plants.
Set three to four hours a day for your plants and seedlings to acclimate. Do this by placing them outside in an enclosed place of shade and shelter from the wind. As the days go by gradually increase the hours of exposure outside. Bring your plants back inside each night.
"You Must Harden Off Your Seedlings" If you don't harden off your indoor seedlings before planting them outside, they will suffer shock from the brutal sun. Without the opportunity to adjust first, they'll get sunburn and might even die. In some situations this is 100% true.
Any amount of sun greater than six hours is considered full sun. What is Part Sun? Part sun is defined as four to six hours of direct sun per day. Not all those hours need to be accrued consecutively—it could mean a few hours of morning sun plus a few more in the afternoon.
Plants that have adjusted to indoor light can burn if placed in outdoor direct sunlight (even if they were in bright direct light inside). Ambient light or shade is best for them to acclimate to outdoors. After about two weeks in the shade, you can move plants more into the sunlight.
Mirrors. Mirrors are a popular way to create the illusion of space in a garden but they will also reflect light and heat from the sun. Mounting a mirror in the brightest section of your garden and directing it towards the darkest area is a great way to improve the light your garden gets.
It can take anywhere from a couple of days to a couple of months for stressed plants to recover. Recovery time depends on the amount of damage that the heat caused to the plant. If a stressed plant is completely neglected during a heatwave, it can take several months or even be impossible to revive it.
Sun-scorched plants can be cut back and fertilized and should recover with time (planting in the ground would be even better!).
Browning leaves are typically caused by under watering, sunburn, or overwatering. If the leaf tips are turning brown and crunchy, the soil likely became too dry for too long in between waterings. This can also cause the plant to drop leaves.
For the 1st day, place your new plants in the protected area for a few hours then bring back indoors. Repeat this for the next 2-3 days, gradually increasing the time spent each day ou tdoors. After a few days, begin exposing the plants to the sun, also increasing the time spent outdoors.
Given time, your body can adapt to the decrease in oxygen molecules at a specific altitude. This process is known as acclimatization and generally takes 1-3 days at that altitude.
The easiest way to harden transplants is to place them outside in a shaded, protected spot on warm days, bringing them in at night. Each day, increase the amount of sunlight the transplants receive. Don't put tender seedlings outdoors on windy days or when temperatures are below 45° F.
So, how hot IS too hot for plants? The general answer is around 90 degrees F, with some exceptions to the rule. This means that when temps rise above 90 and remain there for a lengthy spell: Leaves wilt.
During extremely hot weather (daytime temperatures above 90F and nighttime temperatures above 70F), try to water daily or every other day. In a 10x10-foot garden, this would mean giving your plants 8 to 9 gallons of water each day.
As the light levels increase, it's time to water the plants more frequently! You'll notice your houseplants start to perk up and show signs of new growth. Water your moisture-loving plants once per week and around once every two weeks for low-maintenance plants.
Morning sun is tends to be superior to afternoon sun because it will dry dew from leaves of the plant, which reduces disease, and it is cooler. Most plants, even those that tolerate full sun, will appreciate even momentary respite from the afternoon sun.
Can full sun plants grow in shade? Plants that require 6+ hours of sun per day just won't grow their best in shady spots.
Direct sunlight and high temperatures should be avoided as much as possible. This may sound contradictory, because light and heat are essential for the growth of plants, so-called photosynthesis. For an optimal growth there should be a good balance in climate between temperature, light and humidity.
Take It Slow. Indoor plants need a gradual introduction to the great outdoors. Begin by placing them outside for a few hours per day, then work your way up to an entire 24-hour period.
While transplant fertilizer and triple-mix soil provide invaluable support to plants, it's crucial to remember that recovery from transplant shock takes time. Plants need to adjust and rebuild their root systems, a process that can span several weeks.
Let Your Plant Acclimate
Though you might be tempted to give your plant new digs right away, but it's best to wait at least two or three weeks after getting your new plant. This is especially true if you purchased it online and had it shipped.