Growing a lemon tree in a greenhouse can be a difficult task due to its finicky nature, but with a few preparations it can be done successfully. The first step is to select the right lemon tree. Choosing a disease-resistant variety is essential as this will help prevent viruses or other pathogens that can occur in an enclosed environment. It’s also important to make sure the tree is young and fairly small. This is so it can easily fit into the greenhouse and won’t grow too large for the space.
The next step is to plant the tree in the right container. Since a greenhouse can be humid, it’s best to use a container that won’t trap too much moisture. A pot with sufficient drainage holes and a layer of gravel beneath the soil is ideal. When potting, be sure to fill the container with an acidic soil mix and keep the tree moist but not soggy.
Good air circulation is important for the lemon tree’s health, so adding a fan in the greenhouse is strongly recommended. Additionally, the fan should be positioned so it circulates air away from the tree. This is because cold air can damage the tree’s leaves so it needs to be kept away.
The lighting in the greenhouse must also be optimal for the lemon tree to grow. Natural sunlight will not be readily available in a greenhouse, so a combination of artificial lights and sunlamps is best. Just keep in mind to adjust the lighting according to the season and amount of direct sunlight coming into the greenhouse.
Finally, regular maintenance is required for the lemon tree to grow healthily. Pruning its branches helps to maintain the tree’s size and ensures greater air circulation. Fertilizing with a balanced citrus fertilizer helps keep the tree strong and avoid nutrient deficiencies. Of course, checking for pests and diseases is a must too.
Fertilizing Lemon Trees in the Greenhouse
Fertilizing is a key component of lemon tree care, both for trees in a greenhouse and those growing outdoors. A 5-2-4 fertilizer should be applied at least every 6 months, and higher nitrogen-based fertilizers can be used in the late winter and early spring. These are beneficial for fortifying the tree’s foliage and promoting healthy growth.
It’s also important to use a balanced fertilizer that contains all the essential macronutrients, such as nitrogen, phosphorus, and potassium, as well as micronutrients like calcium, sulfur, and magnesium. This ensures that the tree is getting substantial amounts of all the necessary nutrients, which can’t be provided just be sunlight and water alone.
In addition to this, slow-release fertilizers are also highly recommended as they are absorbed gradually and provide a more even distribution of nutrients throughout the year. This helps avoid any nutrient spikes which can cause harm to the tree. Also, water the fertilizers slowly, as too much can be just as damaging as too little.
Finally, it’s best to only fertilize the soil, not the lemon tree’s foliage and fruit, as this can cause burns and other damage. If the tree’s leaves and fruit start to show signs of nutrient shortages, then foliar fertilizers can be used, but be sure to follow the manufacturer’s instructions carefully.
Maintaining Optimal Humidity Levels in the Greenhouse
The humidity levels of the greenhouse should be kept between 40-60%, as anything higher can lead to fungal and bacterial diseases. If necessary, humidifiers can be installed in the greenhouse, as this helps maintain adequate levels of moisture in the air for the lemon tree to grow.
In terms of watering, this should be done regularly and evenly, but it shouldn’t be too much as this can lead to root rot. Checking the soil moisture is therefore important and if the soil is found to be too wet, the watering frequency should be reduced. Also, the container should be checked to make sure there aren’t any waterlogging or drainage issues.
Aside from this, the greenhouse must be kept well-ventilated and light exposure must also be adequate, as both these things can also help regulate the humidity. The temperature in the greenhouse should also remain consistent and stay within the range of 20 – 30 degrees Celsius.
Finally, the location of the greenhouse must be in an area that doesn’t experience frequent winds, as strong gusts can cause too much evaporation. Choosing an area that is out of direct sunlight and sheltered from strong winds is ideal.
Pest and Disease Prevention for Greenhouse Lemon Trees
It’s very important to check the lemon tree for pests and diseases regularly and take prompt action if any are found. Common pests like whiteflies, aphids, and mealybugs can be easily dealt with using insecticidal soap and beneficial insects like ladybugs and lacewings. On the other hand, fungal diseases like brown rot can be handled with fungicide sprays.
Additionally, preventive measures should be taken to further help reduce the risk of pests and diseases. This can include great hygiene around the lemon tree, such as cleaning up fallen foliage and pruned leaves. Keeping weeds at bay and avoiding any overcrowding in the greenhouse can also be beneficial.
It’s also important to keep the greenhouse clean, dust-free, and properly ventilated. Also, regular sanitation should be done using biodegradable soaps and warm water. These steps help limit pests and diseases from spreading and provides a safe and healthy environment for the lemon tree to grow.
Monitoring and Adjusting the Greenhouse’s Environment
It’s essential to monitor and adjust the conditions in the greenhouse as necessary, as this helps keep the lemon tree healthy. The temperature, humidity, and lighting levels should be checked daily and kept within the optimal range.
The lemon tree should also be checked for pests and diseases every few days. This can include inspecting the bark, leaves, and twigs of the tree for any signs of irregularities. Also, make sure to prune any wilted or dead leaves promptly and keep the soil even and moist.
Managing the airflow in the greenhouse is also very important. This can be done by adjusting the fan speeds and its direction, so it is always blowing away from the lemon tree. This helps the tree get sufficient air circulation without becoming too exposed to cold air which can reduce its health.
In terms of adding fertilizer, this should be done seasonally and according to the manufacturer’s instructions. It’s also important not to over-fertilize, as too much can harm the lemon tree too. Finally, be sure to use a fertilizer that is specially designed for citrus trees, as this’ll provide the best nutrition.
Providing Adequate Water for the Lemon Tree
The lemon tree needs a steady and consistent supply of water to thrive, and in a greenhouse this can be regulated easily. Water the tree regularly and test the soil moisture to make sure it always remains evenly moist. If necessary, use a water meter to ensure the soil never gets too dry.
Also, water the lemon tree early in the morning or late in the evening to avoid evaporation. Additionally, direct watering is needed too, as just relying on rain in the greenhouse is not enough for the tree’s nourishment. Lastly, it’s best to water using a hose and not a sprinkler as the water reaches the roots directly, allowing for a more even and thorough distribution.
