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When To Use A Growing Light In A Greenhouse

It cannot be obvious to know when to use a growing light in a greenhouse, so remember that it’s when the existing light intensity is not optimal and if the growing plants need it. The Auburn University Office of Sustainability has mentioned that one of the advantages of greenhouses is that you can have full control of the environmental conditions. And one of these conditions relies on artificial light, so you must know how to use it correctly. 

Gone are the days when farmers have to worry about extreme and unpredictable weather because greenhouses allow productivity all year round, including tripling crop yields. However, it’s essential to learn the requirements of your plants to guarantee this impressive success. Below is a guide on when to use a growing light in a greenhouse. 

When To Use A Growing Light In A Greenhouse


When To Use A Growing Light In A Greenhouse Correctly


Supplementation needed

We all know that plants need light to perform photosynthesis, so a successful greenhouse should provide this in addition to other optimal conditions. According to Cornell Information Technologies, natural sunlight is sometimes enough for the greenhouse. But in some cases, this leads to problems in temperature that can affect the plants negatively. 

As a result, greenhouses use cooling systems and reduce the light levels to control the temperature. This can then potentially lead to another problem, which is the lack of light. In this case, you want to provide a growing light to support the plants. 

Another example that dictates when to use an organic light in a greenhouse is during the winter months. In the Northeastern and Northwestern parts of the US, the cloudy conditions affect the amount of light that could get in the greenhouse. This is where using a growing light is going to be necessary. 


Young plants vs. mature plants

A growing light, from the name itself, is something you’ll use for the greenhouse to support your plants’ optimum growth. However, it’s worth remembering that different plants and vegetables vary in their requirements for growth. Michigan State University even mentioned that light plays a role in the fruit yield of plants. 

Once your seedlings germinate, you’ll notice the effect of the light levels to their growth. If the growing plant does not receive enough light, it will end up weak with thin stems. And even if it survives to mature, the stem will not thicken. 

As your plants grow, you may need to use a higher growing light intensity to ensure that even the older leaves receive light as much as the new ones. Simultaneously, the type of plants you’re growing will also affect the need for a growing light in a greenhouse. For example, you will need a growing light for plants moving into the fruiting or flowering phase during the months with limited natural light. 

In North America, you will need to use a growing light to support tomato production because it usually happens at the end of October. On the contrary, some plants grown for vegetative parts may not need a growing light since they stay at this growth stage anyway. Still, low light levels during winter may require you to have a growing light to prevent plant growth from slowing down. 


How Long Should You Use A Growing Light In A Greenhouse?

As mentioned previously, the light requirements for each plant vary. Therefore, the duration of usage of a growing light in a greenhouse will depend on the plants you have. You can classify your plants in long-day and short-day groups to make the planning of growing light duration easier.

Long-day plants will grow best and undergo the reproductive phase when the day is long, while short-day plants would be better if the night is longer. This is why some plants will start to flower even in the fall. And since short-day plants like herbs are grown for their vegetative phase, you can use an organic light to extend the day length. 

Overall, the success of your greenhouse is affected by the light it can provide. It’s crucial to know your crops’ individual lighting needs while also being mindful of the other requirements they need to thrive. At the same time, it’s worth noting that failure to meet the proper spacing on your crops can also affect the amount of light. 


Can You Have Too Much Light In A Greenhouse?

You must maintain the optimal lighting conditions in the greenhouse because too much light also equates to high heat energy that can affect the plants. This is where the balance of light and temperature is vital in a successful greenhouse. For temperature control due to too much light in the greenhouse, you can use cooling systems, evaporative cooling, and shadings. 



A successful greenhouse depends on the planning and execution of each crop’s optimal growing conditions and requirements. Knowing when to use a growing light in a greenhouse is one of them, so note that it’s during the times when the existing light intensity is not optimal and if the growing plants need it. Each plant and growth phase may require a specific depth and duration of growth, which means careful planning and preparation are mandatory. 

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How to Harvest Marigold Flowers and Seeds: Tools And Tips

How to Harvest Marigold Flowers and Seeds: Tools And Tips

Want to know how to harvest marigold flowers and seeds? Marigold flowers are a mainstay in most of the gardens. They bloom beautiful flowers all season long and they’re easy to grow from seed. Knowing how to save marigold seeds is essential if you want to continue growing them the next season.

Fortunately, harvesting marigold seeds are quite quick and easy. You only need to take the seeds from the flowers and let them air dry before storing them during the winter season. You can pack it up with a container or seed packets to save even more for the next growing season. Some of the marigold flowers are edible and best to mix in your salads to add a distinct flavor to it.


Tools You’ll Need to Harvest Marigold Flowers

The tools you’ll need to harvest marigold flowers include a basket or other available containers that can be used in harvesting flowers. You’ll also need some paper towels, a sharp knife, a pair of scissors, or gardening shears.

Since you need to evaluate or describe the process, get yourself some notes. Seed packets can be envelopes or closed-air containers excluding plastic containers and bags.


How to Harvest Marigold Flowers and Seeds

Here’s how you can harvest marigold plants for flower arrangements and bouquets:


Letting Marigold Flowers Dry

It’s important to wait until the right time to collect marigold seeds. You can harvest the seeds when the petals are dry already (when the base of each flower turning brownish). However, make sure there’s still is a bit of green color left in the base of the bloom. If you also wait until it is completely turned brown, it may start to rot or mold. It’s important to wait for the perfect time to harvest marigolds since the timing is crucial to have the right quality of marigold seeds.

Tip in harvesting: While you are harvesting, simply cut each marigold flower heads using your cutting equipment or either pinch it with your finger. However, be sure not to pull the flowers as it can harm the roots of your marigolds.


Opening the Marigold

Get your paper towel and set it on a flat surface. After, hold each bloom’s base, pull-off, and discard the petals and leaves of it. Then, you will easily notice the attached seeds inside the base. In the meantime, set the prepared blooms on your paper towels for bulk removal of seeds. You may also use larger towels to manage and accommodate the abundant blooms of your marigolds.


Removal of Marigold Seeds

Marigold seeds are likely to have a long, slender, and pointed appearance. Divided ends with black color and white color on the opposite edge. Gather your blooms, pull-off all petals, and leaves, and start pulling the seeds from the base. After getting all marigold seeds, discard the base in a single place like in bins or garbage bags. After sorting, put another paper towel on another flat surface and spread the pulled marigold seeds on it.


Drying of Seeds

As mentioned above, let your marigold seeds air dry for about a week in an uncovered paper towel. It will enable them to be preserved even in frost season and will prevent it from getting rot and mold.


Seed Storing

After drying the seeds, gather them and start placing them inside your seed packets to prolong their lifespan and will still be used after the frost date. Do not use plastic bags in storing your marigold seeds because it will retain residual moisture, which will affect your marigold seeds and even get rot and mold. To avoid forgetting about your marigold seeds, put a label on it to prevent possible disposal if unlabeled.


Using Stored Seeds for Replanting

After storing your collected marigold seeds, it is perfect to plant during the growing season. You can enjoy once again the benefits of it from house beautification to an edible ingredient for your salad.


Facts about Marigold Flowers

Marigolds are especially good for repelling insects and pests, making them companion plant for tomatoes, eggplants, tomatoes, and chili pepper because of its pungent scent of some variety. It is amazing having this kind of flow in your plant, imagine you don’t only have a beautiful attractive garden but having also a very natural insect and pest repellent that will protect your plants from any abrogation.

African marigolds have larger flower heads on plants that grow from 10 to 36 inches tall. While French marigolds are smaller and bushier, having only two inches of flower head across on plants and only having six to eighteen inches height. Sizes and colors vary on its classification, having a mixed combination is pretty great, will also add more pleasant and abundant color to your garden.


The Benefits of Growing Marigolds in a Greenhouse

Have you ever thought of growing your marigolds in a greenhouse? If you haven’t, it’s time to consider getting a greenhouse.

Greenhouses are great for keeping your marigolds safe from pests and diseases. Marigolds are susceptible to insects and blight, such as caterpillars, aphids, leaf spots, and mildews. You can lower the risk of plant damage by growing your marigolds in a greenhouse.

Additionally, greenhouses can also keep your plants safe from bad weather that could easily damage your flowers.


Final Thoughts on How to Harvest Marigold Flowers and Seeds

Knowing how to harvest marigold flowers and seeds is crucial if you’re planning to plant them in your garden. These beautiful flowers that usually come in yellow and orange colors are a great addition to any garden or flower arrangement.

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