Optimal Temperatures In A Greenhouse For Petunias - Krostrade

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Optimal Temperatures In A Greenhouse For Petunias

Are you aware of what are the optimal temperatures in a greenhouse for growing petunias? It can be confusing at first because they differ for every growth stage. However, many university extensions are generous in sharing information for planting, rooting, and growing petunias in the greenhouse. 

The effectiveness of a greenhouse in growing plants will only be possible with the practice of each plant’s ideal conditions. One of the significant factors that you have to maintain in growing petunias in the greenhouse is the temperature. Upon meeting these requirements, you can reap the benefits of greenhouse gardening amidst the conditions outside.

What Are The Optimal Temperatures In A Greenhouse For Growing Petunias


What Are The Optimal Temperatures In A Greenhouse For Growing Petunias: Gardener’s Guide

Below are different temperatures for planting, rooting, and growing petunias. You must maintain the greenhouse in these conditions and adjust accordingly, depending on your growing zone. The Missouri Botanical Garden mentioned that these flowers grow well in zones 10 to 11, so study your area’s rating beforehand. 


Optimal temperatures for planting petunias

According to Iowa State University, you can start your petunia seeds in containers, but it’s crucial to maintain the location at 75 to 80°F for optimum seed germination. High temperatures above 90°F and direct sunlight can prevent germination. Once the seeds germinate after 7 to 10 days, the temperatures should be at 60 to 65°F. 

Greenhouses are excellent for those who want to grow petunias from seeds since outdoor planting is more natural with transplants. But what are the optimal temperatures for petunias if you’re transplanting them from the greenhouse to the garden? The University of Minnesota Extension recommends waiting for the soil to warm up at 60°F to avoid damages from frost.

Besides, remember to lower the night temperatures at 63 to 65°F to prepare them for transplanting. Speaking of soil temperatures, Utah State University noted that maintaining the growing media in the greenhouse at 65 to 75°F, or 70 to 72°F in particular, leads to successful seed germination. In the greenhouse production of petunias in Auburn University, you can also maintain 75 to 78°F for the first five days, 68 to 75°F once you see cotyledons unfold, then 65 to 70°F when you see the real leaves. 

And for the irrigation and mist in the greenhouse, use water at 70°F.


Optimal temperatures for rooting petunias

Sometimes, gardeners prefer rooting petunias instead of growing them from seeds. In this method, you want to root the plants for 2 to 3 weeks between 64 to 75°F. The advantage of rooting or using cuttings is that the plants you’ll grow are similar to the original and will bloom earlier. 


Optimal temperatures for growing petunias

For growing and maintaining petunias in the greenhouse, remember the numbers for day and night temperatures. During the day,  the temperatures should be 64 to 75°F and 55 to 64°F at night. However, there are some cases where petunias are hardy even at 95°F

Did you know that the plant height, flowering time, and lateral branching of petunias are affected by temperatures? Between 50 to 77°F, the highest temperature can make taller plants, hasten to flower, and lessen lateral branches. And if you have just transplanted petunias, experts recommend using 63°F for ten days first. 


Other Greenhouse Requirements For Growing Petunias

Besides temperatures, there are some guidelines that you must meet with petunias in the greenhouse. Remember to use a light, well-drained soil with average fertility at a pH of 6.0 to 7.0. And for hardening petunias from the greenhouse to outdoor beds, use a sheltered area to help them adjust. 

Once petunias are established, give up to 2 inches of water every seven days. Monthly feeding using a balanced fertilizer will also encourage growth and blooming. If your petunias stop flowering, prune the shoots but do not remove all of the leaves.

Using a liquid fertilizer and watering well will help with flowering. As for deadheading, double petunias and those with large flowers require removal of old and dying flowers. If you’re using cultivars with smaller flowers, they will usually do this themselves. 

What problems can you expect in growing petunias? The good thing with this flower is it has a few issues such as aphids and slugs. Proper watering and humidity control can also address petal blight and other diseases. 


What Is The Best Petunia For Greenhouse?

The Grandiflora singles, Multiflora singles, and their double flower forms are the most famous horticultural types of petunias. Grandiflora has large flowers, and many cultivars offer a wide range of colors, but the smaller Multiflora can withstand demanding conditions. 



Many university extensions have written about the convenience and advantages of growing and producing petunias in a greenhouse. But do you know what are the optimal temperatures in a greenhouse for growing petunias? This is a crucial question as the greenhouse temperature plays a significant role in the success of petunias. 

Each growing stage, whether during planting, rooting, or growing, has different temperature requirements. Failure to meet them can affect the germination, growth, and quality of your petunias. In general, 64 to 75°F at day and 55 to 64°F at night are best for growing petunias in the greenhouse. It would also help that you learn your planting zone to know the temperatures to expect in your area. 

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How to Start an Avocado Farm: 4 Things to Remember

How to Start an Avocado Farm: 4 Things to Remember

Are you interested to learn how to start an avocado farm? Embarking on this journey requires time, effort, and commitment. Plus, you need to consider a number of factors including soil preparation, as well as weather conditions.

You’re probably aware that avocado trees or Persea spp, are originally from Mexico. This explains why one of the famous Mexican cuisines include avocado-based guacamole.

You can choose to grow avocado trees indoors or outdoors. If you plan to grow them in a hobby greenhouse or at home, all you have to do is to sow the seeds in pots. When they’re grown outdoors, avocado trees can grow up to 40 feet. You can al

Moreover, these trees thrive well in regions where the weather is mostly warm and sunny. However, don’t expect them to grow in areas that experience extreme temperatures during the summer and winter.


Avocado: The Superfood

Did you know that the global demand for avocados has been steadily increasing? Aside from the fact that its fruit is known for its full, buttery flavor and rich texture, it’s also packed with loads of essential nutrients that are good for your body.

A single serving of avocado fruit contains vitamin K, vitamin C, folate, potassium, vitamin B1, vitamin B2, vitamin B3, vitamin B5, vitamin B6, vitamin E, manganese, magnesium, iron, copper, zinc, and vitamin A.  It also has protein, fiber, and healthy fats. If you’re on a low-carb plant food diet, you’d want to incorporate avocados into your diet.


What are the Growing Requirements of an Avocado Tree?

Since avocado trees need to be grown in warm semi-humid climates, they only grow in U.S. Department of Agriculture (USDA) plant hardiness zones 8 to 11. However, it’s important to note that while avocado trees may be grown in those zones, they don’t always thrive well in areas that get extremely hot during the summer or frosty, chilly, or snowy in the winter. This implies that the ideal environment for an avocado tree should have moderate temperatures all-year-round.


What are the 3 Primary Groups of Avocado Trees?

If you’re planning to start an avocado farm, you need to know the 3 main groups of avocado trees: Guatemalan, West Indian, and Mexican. Each type has its own ideal growing range.


Guatemalan Avocados

A Guatemalan avocado is known for its hard skin that features plenty of warts.


West Indian Avocados

This type of avocado tends to flourish in warm climates. Unlike the Guatemalan avocado, a West Indian avocado has thin and shiny skin and could weigh up to 5 pounds.


Mexican Avocados

A Mexican avocado thrives well in tropical highland areas. Compared to the other avocado groups, the Mexican avocado is more tolerant of cold weather. In fact, it can manage to survive even when temperatures drop to 26˚F.

Moreover, this type of avocado produces smaller fruit that weighs less than a single pound and its skin has a distinct papery-smoothness to it.


Expert Tips on How to Start an Avocado Farm

Unless you’re willing to take on a long-term project, spend a considerable amount of money on planting, and wait for a period of 3 to 5 years for your first harvest, don’t get into avocado farming. However, if you’re willing to go through the whole nine yards to enjoy top yields for many years, check out this guide:


Tip #1: Plant them in areas where the temperatures are consistently cool

Be sure to plant your avocado trees in cool temperatures that can range between 68˚F to 75˚F on a daily basis to avoid fruit drop. However, when they’re flowering, or when they’re starting to bear fruit, the humidity levels shouldn’t go below 50% at midday.


Tip #2: They don’t like wind

In case you’re not aware, avocado trees have brittle branches that easily snap off. For this reason, it’s best not to plant them in areas that are mostly windy because wind can cause considerable damage to their fruit.


Tip #3: Most of them need proper irrigation

If your avocados are rain-fed, they need to have at least 1,000 mm rainfall spread out throughout each year. Before their flowering season, avocado trees require a drier season that lasts for about 2 months. On a weekly basis, avocado trees need about 25 mm water.

It’s extremely important to test the quality of irrigation water because if its pH and bicarbonates are really high, they trigger a build-up of free lime in the soil. You also need to remember that high levels of sodium and chloride can have a negative impact on your avocado plants.

Since the plant’s roots are shallow, the ideal way to apply water is via a micro-sprinkler or drip. This ensures an even distribution throughout the avocado tree’s root area.

Moreover, proper moisture control needs to be ensured in the root zone because this area tends to easily dry up.


Tip #4: Determine the soil’s suitability and prepare it accordingly

You can’t just plant an avocado seed on soil that hasn’t been prepared accordingly. To prepare the soil for planting, you need to dig soil profile pits throughout your farm. Make sure that the pits are 1.5 m deep.

Only a single put per ha is required. However, you need to dig more pits if the location is non-homogenous or hilly. Check the color of the soil, its texture, structure, patches, sitting water, concretions, hardpans, stones, and gravel.



Grow Your Avocado Trees in a Hobby Greenhouse!

Since avocado trees require specific levels of temperature and humidity, you’ll find it easier to grow them in a hobby greenhouse. The enclosed space allows you to customize the environment to meet the needs of your plants. What’s more, it protects them from strong winds and the constant threat of pests.

Learning how to start an avocado farm outdoors is great, but growing them inside a hobby greenhouse is even better.



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