How Big Should My Plants Be After 2 Months?

Milosh Potikj | September 13, 2023 | 10 MIN READ


You've taken the plunge, set up your system, and have nurtured your green babies for the past two months. But now you're wondering, "How big should they have grown by now?" Dive in with us as we enthusiastically break down the growth benchmarks you should be looking for, ensuring your hydroponic plants are flourishing on the right track! Prepare to be both informed and amazed, because the future of gardening is here, and it's absolutely splendid!

The Benefits of Hydroponic Growing

Hydroponic growing offers numerous benefits for plants, ensuring optimal growth and yield. By providing plants with precisely what they need, hydroponics eliminates the guesswork of traditional soil-based gardening. Here are some key advantages of hydroponic growing:

  • High-quality nutrient solution: Hydroponic systems use a nutrient-rich solution that contains all the necessary elements for plant growth. This ensures that the indoor plants receive the exact nutrients they need for robust and continuous growth.
  • Temperature and pH control: In hydroponics, growers have complete control over the temperature and pH levels of the nutrient solution. Maintaining the ideal conditions for plant growth promotes better nutrient uptake and overall health.
  • Continuous growth: With hydroponics, plants can grow year-round regardless of seasonal changes. The ability to create an ideal environment for growth allows for constant production and quicker harvest times.
  • Monitor and adjust: Hydroponic systems enable growers to closely monitor and adjust the nutrient solution regularly. This allows for precise control over nutrient concentrations, preventing nutrient deficiencies or toxicities.
  • Water efficiency: Hydroponic systems use significantly less water compared to traditional soil-based methods. The water used in hydroponics is recycled, reducing water loss and promoting sustainability.
  • Space utilization: Hydroponic systems can be set up indoors, making them ideal for urban areas or limited spaces. This allows people with small gardens or no access to outdoor space to grow their own fresh produce.

How Big Should Your Plants Be After Two Months?

After two months of growth, hydroponic plants should have reached a significant size and be well into the vegetative stage of growth. This stage is characterized by the expansion of the plant's foliage and the development of strong root systems. The size of the plants depends on various factors such as the type of plant, the specific strain, the growing conditions, and the outdoor growing techniques employed. In general, though, hydroponic plants should have established a substantial root system and dense green foliage after two months. 

Vegetative Stage vs Flowering Stage

The vegetative stage and flowering stage are two distinct phases in the growth cycle of the plants. Understanding the differences between these stages is crucial for hydroponic growers to ensure optimal plant growth and maximize yields.

During the vegetative phase, plants focus on developing a strong root system and lush foliage. This stage typically lasts for 4-6 weeks, depending on the strain and growing conditions. Generally, plants require 18-24 hours of light per day during this stage to promote vegetative growth. Green, fan-like leaves are characteristic of this stage, and plants should have a vibrant, healthy appearance.

In contrast, the flowering stage is when the plants start to produce buds. This phase begins when the plants are exposed to a light schedule of 12 hours of light followed by 12 hours of darkness. The plants will transition from the vegetative to the flowering stage as they receive this reduced light schedule. The flowering stage can last for 8-10 weeks or longer, and the exact duration depends on the strain being grown.

During the flowering stage, plants require specific ratios of nutrients to encourage bud development and maximize yields. Phosphorus and potassium are crucial for bud formation, while nitrogen should be decreased. Growers should be aware of signs of nutrient deficiencies and adjust their feeding schedule accordingly.

By understanding the unique requirements of each stage and providing the appropriate light schedules, nutrient solutions, and environmental conditions, hydroponic growers can ensure healthy and robust growth in their plants.

The Vegetative Growth Phase

The vegetative growth phase is a crucial stage in the development of hydroponic plants. During this phase, the plants focus on establishing strong root systems and growing lush green foliage.

One key factor in the vegetative growth phase is the lighting duration. Plants require ample light to photosynthesize and produce energy for growth. Hydroponic growers typically provide their plants with 16-18 hours of artificial light per day to mimic the long days of summer. This extended light period promotes vegetative growth and prevents premature flowering.

Optimal temperature and humidity levels are also essential for healthy vegetative growth. The ideal temperature range for most plants in this phase is between 70-80°F (21-27°C). Humidity levels should be kept around 50-60% to prevent excess transpiration and water loss.

Monitoring the health of the plant roots is crucial during the vegetative growth phase. As the roots are responsible for nutrient absorption, it is essential to regularly check for signs of nutrient deficiencies, such as yellowing or curling of leaves. Maintaining a pH-neutral water solution, ensuring proper water levels, and providing sufficient oxygen to the roots are all important aspects of monitoring root health.

Fan Leaves and Green Leaves

Fan leaves and green leaves play a crucial role in the growth and development of hydroponic plants. These leaves are essential for the overall health and productivity of the plants.

Fan leaves are large foliage that branches out from the main stem. They are important for photosynthesis, the process by which plants convert light energy into chemical energy. Fan leaves contain chlorophyll, the pigment responsible for absorbing light, which is necessary for photosynthesis. Through photosynthesis, plants produce their own food and energy, enabling them to grow and thrive.

Furthermore, fan leaves provide shade to the lower parts of the plant, preventing excessive exposure to light and heat. This shade helps regulate the temperature and protects the plant from damage caused by intense light.

On the other hand, green leaves indicate a healthy and thriving plant. They are responsible for absorbing nutrients from the nutrient solution and water in hydroponic systems. These nutrients are then transported throughout the plant to facilitate growth and development.

Bud Sites and Harvest Times

During the flowering stage of hydroponic plants, bud sites play a crucial role in determining the ideal harvest times. Bud sites are the locations on the plant where flowers develop. These sites indicate the maturity and readiness of the plants for harvest.

The timing of bud development is directly linked to the overall growth and maturity of the plant. As the plant progresses through different stages of growth, the bud sites develop and change. Initially, small white hairs, called pistils, emerge from the bud sites. Over time, these pistils change color, usually transitioning from white to orange or red. This shift in color indicates the maturation of the buds.

Monitoring the development of the bud sites is essential to determine when they are ready for harvest. Visual inspection is a helpful method, but magnification tools, such as a jeweler's loupe or a microscope, can aid in assessing the readiness. The visibility of trichomes, tiny resin glands on the buds, is another indicator of harvest readiness. Trichomes change color from clear to milky or amber as the plant matures.

Taking these indicators into account, hydroponic growers can determine the optimal time to harvest their plants. By carefully observing bud sites and assessing factors such as trichome visibility and pistil maturity, growers can ensure a bountiful and high-quality harvest.

Growth Requirements for Your Plants

Hydroponic plants require specific conditions to thrive and reach their full potential. After 2 months, the size of your hydroponic plants will depend on various factors, including the strain, growing conditions, and overall care.

Nutrient Solution

In hydroponic growing, a nutrient solution serves as the primary source of nourishment for plants. This solution consists of various macronutrients and micronutrients that are dissolved in water and supplied directly to the plant roots. Providing the right balance of nutrients is crucial for optimal plant growth and development.

During the vegetative stage, plants require key macronutrients, namely Nitrogen (N), Phosphorus (P), and Potassium (K). These nutrients play vital roles in the growth and development of plants. Nitrogen is essential for the production of chlorophyll, which is responsible for the plant's green leaves and overall leafy growth. Phosphorus is necessary for energy transfer and essential for root development and flower formation. Potassium helps regulate water and nutrient uptake, enhances disease resistance, and contributes to overall plant health.

Each macronutrient has a specific function during various stages of growth. In the vegetative stage, plants require higher amounts of Nitrogen to promote leafy growth and establish a healthy root system. Phosphorus aids in the development of strong roots, while Potassium helps maintain plant structure and promotes disease resistance.

Water Level and Fresh Water

Maintaining the appropriate water level and using fresh water are crucial factors in promoting optimal growth in hydroponic plants. It is important to ensure that the water level is neither too high nor too low.

Overwatering can lead to nutrient deficiencies and poor drainage, which can negatively impact the plant's health and growth. When the water level is too high, it can suffocate the roots and deprive them of oxygen. This can result in root rot and hinder the plant's ability to take up essential nutrients.

Using fresh water is equally important as it helps prevent the accumulation of salts and other dissolved solids that can be harmful to the plants. Freshwater also ensures that the plants have access to the required minerals and nutrients without the presence of any impurities.

Furthermore, it is essential to avoid using water with extreme pH levels. Highly acidic or alkaline water can disrupt the nutrient absorption by the roots and cause nutrient deficiencies in the plants. Maintaining a ph-neutral water source is critical for the proper development of hydroponic plants.

More: Hydroponic Systems: How To Clean and Reuse Water.

Hours of Light or Artificial Light

In hydroponic gardening, the hours of light or artificial light play a crucial role in the growth and development of plants. Different spectrums of light have varying effects on plants during different stages of growth, such as the vegetative and flowering stages.

During the vegetative stage, plants require longer hours of light for vigorous growth. Generally, a minimum of 18 hours of light per day is recommended for optimal vegetative growth. This stimulates photosynthesis, which leads to the production of energy and growth of green leaves and fan leaves. Using artificial light sources such as Metal Halide lights or High-Pressure Sodium (HPS) lights can provide the necessary light intensity and spectrum for healthy vegetative growth.

As plants transition into the flowering stage, reducing the hours of light to around 12 hours is essential. This change in light cycle signals the plants to shift their focus from vegetative growth to flower production. High-Pressure Sodium lights are commonly used during this stage as they emit a yellow-orange spectrum, which promotes flowering and bud development.

However, newer technology like LED grow lights are now gaining popularity among hydroponic growers. LED lights offer full spectrum lighting, allowing growers to customize the spectrums according to the specific needs of their plants. LED lights also consume less energy and produce less heat compared to traditional lighting options.

Container Size and Planting Medium

When it comes to hydroponic growing, container size and planting medium play a crucial role in determining the size of your plants after two months. The container size directly affects the development of the root system and the overall growth of your plants.

A smaller container restricts the root system's growth and can lead to stunted plants. On the other hand, a larger container allows for a more extensive root system, providing the plants with increased access to nutrients and water. This, in turn, leads to healthier and bigger plants.

The planting medium is equally important. It should be well-draining to prevent waterlogged roots, which can lead to root rot and other nutrient deficiencies. Additionally, the medium should retain enough moisture to ensure adequate hydration for the plants.

The size of the container and planting medium also affect aeration and watering frequency. A larger container provides better aeration to the root system, allowing for more oxygen uptake and preventing suffocation of the roots. This promotes optimal growth and development.

Choosing the right container size and planting medium is crucial for successful hydroponic plant growth. Always refer to the seed packet for information on the expected size of the plant. If multiple plants are being grown in one container, a wider container is necessary to provide enough space for their root systems to expand.

By considering container size and planting medium in your hydroponic system, you can ensure that your plants have the optimal conditions for vigorous growth and reach the desired size after two months.


What should my plant look like at 8 weeks?

At 8 weeks, during the vegetative stage of growth, hydroponic plants should exhibit robust and vigorous development. With plenty of light and a well-balanced nutrient solution, you can expect your plants to have a bushy appearance with multiple branches and leaves. The plant should have grown significantly from the initial stage and be filled with green, healthy foliage. This stage focuses on promoting vegetative growth, so avoiding any signs of stress or nutrient deficiencies is essential.

How big should my plants be after 2 weeks?

After 2 weeks of growth in a hydroponic system, your plants should have established a sturdy foundation. While the size can vary depending on the strain and growing conditions, they typically reach a height of 4 to 8 inches. At this stage, the focus is on establishing a strong root system and developing healthy leaves. Proper lighting, temperature, and a balanced nutrient solution are crucial to ensure rapid growth and overall plant health.

How tall should your plants be before switching to flower?

Before switching to the flowering stage, hydroponic plants should ideally be around 12 to 16 inches tall. However, the height requirement may differ depending on the strain, environment, and personal preferences. It's important to keep the plants in the vegetative stage until they have enough developed branches to support a robust flowering phase. Remember to consider the available vertical space in your growing area, as well as the growth patterns of the specific strain you are cultivating.

Can too much light stunt growth?

Yes, providing excessive light beyond what the plant can effectively absorb can stunt growth and cause various problems. While plants require adequate light for photosynthesis and growth, excessive light can cause stress and lead to light burn or bleaching, leaving the leaves discolored and damaged. Maintaining a proper balance of light intensity and duration is crucial for promoting healthy growth. It is recommended to follow the recommended hours of light for each growth stage and adjust the intensity according to the plant's needs.


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