Growing Avocados at Home: Instructions, Care, Diseases, and Pests

Growing an avocado from a pit is quite an interesting and exciting process. Moreover, under the right conditions, this exotic plant can even bear fruit, delighting you with juicy and healthy avocados. However, getting the desired result takes more than just sticking toothpicks into a seed and placing it in water. The outcome depends on the quality of the fruit, its variety, and following the right steps.

Let’s break down all the nuances and possible mistakes when growing an avocado from a pit indoors.

Growing an avocado from a seed: important nuances

Before bringing this idea to life, you need to pay attention to a few key points.Let's look at them in more detail.

The avocado is a tree that reaches 52–65 feet (16–20 m) in height in nature and up to 6.5 feet (2 m) indoors. Since it grows in the tropics, it is crucial to create similar conditions: warmth and high humidity. If you do not have the time or ability to do this, it is better to abandon the process, as it will stop at the sprout stage.

A sprouted tree does not always bear fruit, so you shouldn’t count on a rich harvest. The avocado is more of an ornamental plant, and any fruits you do get will differ in taste from store-bought ones and have a more modest size.

1. The sap of avocado leaves contains toxic substances that can be dangerous. You shouldn’t grow it if there are pets or small children in the house who might eat the leaves.
2. The plant will need specialized fertilizers that allow it to quickly build green mass.
3. The soil should ideally be light and nutrient-rich. Standard garden dirt or basic floral potting soil is poorly suited for these purposes.
4. Not all fruits are capable of sprouting, so you need to carefully select suitable specimens for germination.

Choosing a Suitable Specimen

Most avocados arrive on store shelves unripe, which can cause certain problems with germination.To avoid this, you need to pay attention to these important points when choosing a fruit.

1. The fruit should be a rich, dark green color with a uniform texture and a thick, intact skin.
2. The avocado should have a light, pleasant, buttery aroma without any hints of dampness or rot.
3. If there isn’t a suitably soft and well-ripened fruit available, you can buy the best option and let it ripen at home by placing it on a windowsill.

Experts have noticed that pits from oval, dark green avocados with black specks on the skin sprout the fastest. Lighter, elongated fruits sprout less actively, slowly build up green mass, and constantly stunt their own growth.

Some pits don’t sprout at all, which is also completely normal. Therefore, to guarantee getting an avocado tree, it’s best to sprout several pits at the same time, and then choose the strongest and healthiest specimen.

A pit that has been removed from the fruit and left at room temperature for more than 3-4 weeks may not sprout at all or will grow extremely slowly. Therefore, it should be sprouted immediately after cutting the fruit open.

Germination Nuances

To get the fruit to sprout its first shoot, it takes more than just dropping the pit into water.This process follows this sequence of actions.

1. Carefully make a shallow vertical cut with a sharp knife. Twist the two avocado halves in opposite directions. Carefully remove the pit from the flesh. If it’s hard to separate, you can leave the fruit to ripen further, putting the flesh back in place.
2. Rinse the extracted pit under warm running water, removing any leftover flesh. At this stage, it’s important to be as careful as possible not to damage the protective skin on the pit (which is brown).
3. Dip the pit in a rooting hormone or growth stimulator solution, which will start the sprouting process much faster. Commercial rooting solutions (often found in U.S. garden centers) or warm water with a little honey work best for this.

Once the pit is ready for germination, you can do it in several ways:

Sprouting in soil – the pit is placed in a pot with soil mix, lightly covered with dirt, and watered. A plastic bag is placed over the top of the pot to retain moisture and heat, creating a greenhouse effect. The first sprout usually appears in 5-8 weeks, after which the plant will need to be covered with an additional layer of soil for more reliable rooting.

Sprouting in water – take a glass and fill it 2/3 full of water. Make 4 holes in the avocado pit with an awl, and insert toothpicks into them. Place the pit in the water with the blunt end down, keeping the pointy end in the air. Only 1/3 of the pit should be submerged in the water. The toothpicks should be set at the appropriate level. They will act as stoppers, preventing the pit from falling to the bottom of the glass.

Sprouting in hydrogel beads (water beads) – place the hydrogel beads in a shallow, stable container, fill with water, and wait for them to fully absorb it. Drain any excess water and place the avocado pit blunt end down. You can make 2-3 punctures with a sharp knife on the upper sides beforehand so that sprouts form faster. It is important to place the pit so that the punctures are above the level of the hydrogel beads. Moisture should not get inside the punctures, as this can lead to rotting.

To understand which method is best and why, simply compare the main characteristics of these techniques, as shown in the table.

In a few weeks, roots will form at the bottom of the pit. Once they reach 1.2–2 inches (3–5 cm), the future plant will need to be transplanted to its permanent growing location.

Germination Mistakes

It often happens that the pit doesn't sprout, quickly changes its appearance, and becomes unsuitable for further growing.There can be several reasons for this.

1. Damaging or intentionally removing the brown protective skin – some people remove it in an attempt to speed up germination, but in reality, a pit without this natural protection spoils faster and is prone to rotting.
2. Lack of sufficient heat and moisture – if it’s too cold or there isn’t enough water, the sprout won’t appear anytime soon. That’s why sprouting in a glass of water or hydrogel is preferable to using soil mix.
3. Wrong season for germination – avocados are native to tropical rainforests, so fast germination is typical during the summer months when heat and sunlight are abundant. In winter, the sprout can “sit” inside the pit for 2-3 months showing no signs of life.
4. Stagnant water – if you don’t change the water or if you use untreated tap water, there is a risk that the pit will be damaged by pathogenic bacteria. Pre-planting treatment is mandatory. To reduce the risk of rotting, it makes sense to add 1 drop of hydrogen peroxide to the water during germination.
5. Lack of light and drafts – it is best to place the pit on an insulated or warm windowsill, eliminating the possibility of drafts.

Sometimes a pit won’t sprout under any conditions. This may be due to the fruit being unripe or lacking the genetic mechanisms to germinate. In any case, you should see some kind of result within 2-3 months. If there isn’t one, it makes sense to get a new specimen for germination.

Care Details, Nuances, and Possible Diseases

When the avocado's root system reaches 0.8–2 inches (2–5 cm), it's time to transplant the plant into a suitable pot and create the most optimal microclimate conditions.To do this, you will need to do the following.

1. Prepare the soil – mix equal parts of all-purpose indoor potting soil, orchid bark mix, and peat moss. Treat it with any soil pest control product or pour boiling water over it generously to sterilize it.
2. Choose a high-quality pot – its dimensions should match the size of the pit: if you place the pit in the center, there should be at least 1.2 inches (3 cm) and no more than 2.7 inches (7 cm) to the edges of the pot. The depth of the pot should be around 8 inches (20 cm). For the first year, this will be quite enough. As the roots grow, the pot is replaced with a deeper one. It must have large enough drainage holes in the bottom so that excess moisture doesn’t stagnate and cause root rot.
3. Use vermiculite to improve root system drainage – its volume should be at least ¼ of the pot’s total depth.

Drainage

Drainage hole

Potting mix

Drainage layer — real-life example

1. Remove the toothpicks and any remaining protective skin from the pit.
2. Place a layer of vermiculite at the bottom of the pot, then fill it 2/3 full with the prepared soil mix.
3. Carefully place the pit, spreading out the root system.
4. Cover it with a layer of soil so that it rises 0.8 inches (2 cm) above the level of the pit.
5. Water with filtered or distilled room-temperature water, and wait for the soil to settle a bit. Add more soil mix if necessary.

Move the transplanted plant to a well-lit windowsill. Further care is carried out according to the following scheme:

Watering and moisture – at least twice a week. The water should be filtered/distilled and at room temperature. It’s best to immediately empty any excess water that drains into the saucer after watering so as not to disrupt the natural air exchange in the roots. The plant needs to be misted daily with a spray bottle using boiled or distilled water. An automatic humidifier is also an excellent additional moisture source, especially during winter when indoor heating dries out the air.

Lighting – the avocado needs good lighting and long daylight hours. In winter, the plant will need artificial lighting using grow lights. In the summer, protect young shoots from direct sunlight, which can cause leaf burn.

Fertilizing – it is appropriate to use comprehensive fertilizers for exotic or citrus plants on avocados. They should be applied in liquid form twice a month. In winter, fertilizer should be applied once a month, as the plant is in a dormant state.

Shaping the crown (Pruning) – to get a beautiful tree, the avocado needs to be pruned correctly. The first pruning is done when the trunk reaches 14–16 inches (35–40 cm) in height and has at least 10 leaves. After pruning, at least 5 leaves should remain so the plant can continue to develop. Lateral (side) shoots are pruned when about 5-7 leaves form on them.

Stimulating flowering – for the plant to bear fruit, it must be stimulated beforehand. Starting in late February, apply comprehensive fertilizers for flowering plants. Liquid orchid fertilizers work well for this. In mid-May, the tree can be moved to a balcony or an open area, avoiding direct sunlight. After the flowers appear, they should be cross-pollinated using a thin, soft brush.

To make the process as natural as possible, you can place the tree near a flower bed where flowers are blooming. Insects and the wind will do the job just as well as a brush.

Like other crops, avocados can be susceptible to various diseases and pests, which manifest as follows:

1. Black dots on the back of the leaves that turn into bald spots and drying sores – this is how spider mites manifest, spreading through contact with diseased plants or when the avocado is left outdoors during the summer.
2. Yellowing leaves – indicates root rot caused by overwatering the soil.
3. White powdery coating on the leaves – this is a sign of powdery mildew, which more often affects plants taken out into the garden for the summer.
4. Brown bumps on the trunk and leaves – this indicates a scale insect infestation. Such a pest transfers to the avocado from infected plants, as well as from soil that hasn’t been pre-treated for pests.
5. Leaves curling into a tube – this can indicate spider mites or a general arachnid infestation if the plant has been outdoors for a long time.

When various diseases or pests are detected, you need to inspect the tree, determine the cause, treat it for parasites, and also reduce watering and misting frequency.

To summarize, it should be noted that growing an avocado is not as easy as it might seem, but it is not impossible either. If you correctly follow the entire sequence of actions, from choosing a suitable fruit to pruning and shaping the crown, you can get a beautiful little tree with fairly large, rich green leaves in just a couple of years. Whether it will bear fruit is debatable, as fruit formation depends on a variety of diverse factors.

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