How To Grow Peas in Aquaponics Systems

Aquaponics offers an innovative and efficient way to grow a variety of crops and fish, and one vegetable that can thrive in this symbiotic system is peas. Peas stand out as an excellent choice. With their sweet flavor and versatility, peas have become a favorite among gardeners and chefs alike.

This article will discuss how to grow peas in aquaponics systems. We will discuss the factors to consider when selecting the right pea variety for your system and provide detailed steps for planting, caring for, and harvesting peas. So, let's embark on this journey and discover the joy of cultivating peas in your aquaponics system. 

The Benefits of Growing Peas in Aquaponics Systems

Peas, with their vibrant green pods and sweet, crisp taste, are a delightful addition to any diet. Below are the advantages of growing peas on aquaponics systems.

  1. Peas are known for their rapid growth.
  2. Peas are excellent companion plants for other crops.
  3. Peas are nitrogen-fixing plants, which means they can take nitrogen from the atmosphere and convert it into a form that benefits not only themselves but also other plants in the system. 
  4. Peas are cool-season crops and can thrive in temperatures that are not ideal for many aquaponics plants. 

Choosing the Right Pea Variety

Understanding the different pea varieties is essential when selecting the right one for your aquaponics system:

  1. Garden Peas: These are the classic green peas commonly found in grocery stores. They are often grown for their tender, sweet, and plump seeds that are encased in pods. Garden peas come in both dwarf and climbing varieties.
  2. Snow Peas: Snow peas are known for their flat, edible pods and underdeveloped seeds. They are crisp and sweet, making them a favorite for stir-fries and salads. They are typically grown as bush-type plants.
  3. Snap Peas: Snap peas are a cross between garden peas and snow peas. They have plump pods with edible seeds and are sweet and crunchy. Like garden peas, snap peas can be climbing or bush-type.
  4. Sugar Peas: Sugar peas, also known as sugar snap peas, are characterized by their juicy, sweet pods with full-size seeds. They are often grown as climbing plants and are a popular choice for fresh snacking and cooking.

Factors to Consider in Selecting The Best Peas Variety for Aquaponics

When choosing the right pea variety for your aquaponics system, consider the following factors:

  1. Space and Support: Determine the space available in your aquaponics setup. Climbing pea varieties require vertical support, while bush-type peas are more compact. Choose a variety that fits your available space.
  2. Growth Habit: Consider how the peas grow. Climbing varieties tend to yield more but require trellising, while bush-type peas are more compact and may be easier to manage.
  3. Flavor Preference: Think about your taste preferences and intended culinary use. Do you prefer sweet, tender peas like garden peas, or are you looking for crisp, edible pods like snow peas and snap peas?
  4. Harvest Timing: Different pea varieties have varying maturation times. Some mature early, while others take longer. Consider your desired harvest schedule and plan accordingly.
  5. Compatibility: Ensure that your chosen pea variety is compatible with the other components of your aquaponics system, including the fish species you're cultivating and the environmental conditions in your location.

The role of climate and location in pea variety selection:

Climate and location play a crucial role in determining the success of your chosen pea variety in an aquaponics system:

  1. Temperature: Peas are cool-season crops, and their performance can vary depending on your climate. Some pea varieties are more cold-tolerant, making them suitable for early spring or fall planting. Consider the temperature range in your area and select a variety that thrives in those conditions.
  2. Daylight Hours: Peas rely on the length of daylight to trigger flowering and fruiting. In regions with shorter daylight hours, choose pea varieties that are adapted to these conditions for a more successful harvest.
  3. Local Adaptation: Some pea varieties are better suited to specific regions. Check with local gardening experts or agricultural extension offices to identify varieties that perform well in your area.


Indoor Aquaponics System

Setting Up Your Aquaponics System for Growing Peas

To establish a successful aquaponics system for growing peas, you'll need several key components:

  1. Fish Tanks: These are the aquatic homes for your fish. The size and capacity of your fish tanks will depend on the fish species you choose and the scale of your aquaponics system.
  2. Grow Beds: These are where your pea plants will be grown. The grow beds are usually filled with various grow media, such as gravel, clay pellets, or expanded clay, to support plant growth.
  3. Water Pump: A water pump is essential for circulating water from the fish tanks to the grow beds. It ensures that nutrient-rich water is delivered to the plants.
  4. Aeration System: Proper aeration is crucial for maintaining oxygen levels in the fish tanks. This keeps the fish healthy and prevents the water from becoming stagnant.
  5. Grow Lights (Optional): If your aquaponics system is located indoors or in an area with limited natural sunlight, you may need supplemental grow lights to provide adequate light for plant growth.
  6. Fish: Select fish species that are well-suited for aquaponics and can coexist harmoniously with pea plants. Common choices include tilapia, trout, and perch.
  7. Water Quality Monitoring Tools: Regularly monitor the pH levels and water quality in your system to ensure that they are within the appropriate ranges for both fish and plants.

When designing your aquaponics system for pea cultivation, consider the following:

  1. Grow Bed Size: Determine the size and layout of your grow beds. Ensure that they provide enough space for the number of pea plants you intend to grow. 
  2. Growing Media: Select an appropriate growing medium for your pea plants. Peas typically do well in media like gravel or expanded clay pellets that provide good support for plant roots while allowing for effective water circulation.
  3. Vertical Support: If you're growing climbing pea varieties, plan for vertical support structures like trellises or netting to help the plants climb and maximize space utilization.
  4. Nutrient Delivery: Ensure that the nutrient-rich water from the fish tanks is evenly distributed to the grow beds. Proper water flow and distribution are crucial for optimal nutrient uptake by the pea plants.

How to Plant Peas in Aquaponics System

A.Timing for Planting Peas in Your Aquaponics System

Timing is crucial when planting peas in your aquaponics garden. Peas are cool-season crops, and their growth is influenced by temperature and daylight hours. Here are some guidelines for timing your pea planting:

  1. Seasonal Suitability: Peas thrive in cooler weather, so they are ideally planted in early spring or late summer to early fall, depending on your climate. Avoid planting them in the heat of summer, as high temperatures can stress the plants.
  2. Temperature Considerations: Peas germinate best in soil temperatures between 40°F (4°C) and 75°F (24°C). Monitor your aquaponics system's water temperature and plan your planting accordingly. 
  3. Daylight Hours: Peas rely on the length of daylight to initiate flowering and fruiting. Be mindful of your location's daylight hours and choose pea varieties that match your region's photoperiod.

B.Spacing And Depth Considerations

Proper spacing and planting depth are essential for healthy pea growth and optimal yield:

  1. Spacing: Maintain adequate spacing between plants to allow for good air circulation and light penetration. Bush-type pea varieties typically require spacing of 2-4 inches (5-10 cm) between plants in rows that are 18-24 inches (45-60 cm) apart. Climbing pea varieties need vertical support and can be spaced slightly further apart.
  2. Planting Depth: Plant pea seeds approximately 1-2 inches (2.5-5 cm) deep. If transplanting pea seedlings, ensure that they are planted at the same depth they were initially grown.
  3. Vertical Support: For climbing pea varieties, install trellises or netting to support the vines as they grow. This ensures that the plants remain upright and that the pods are easy to access during harvest.

3.Tips for Successful Pea Planting

To ensure successful pea planting and a bountiful harvest in your aquaponics garden, consider these tips:

  1. Pre-soaking Seeds: Some gardeners recommend pre-soaking pea seeds for a few hours or overnight before planting. This can help improve germination rates.
  2. Regular Pruning: For climbing peas, regularly prune the side shoots to encourage upward growth and maximize space utilization.
  3. Adequate Support: Ensure that climbing pea varieties have sturdy vertical support, and regularly check that the vines are securely attached to the trellises or netting.
  4. Water Management: Maintain consistent moisture levels in the aquaponics system. Avoid overwatering or allowing the roots to dry out. The system's water cycle should provide adequate moisture for the pea plants.
  5. Pest and Disease Management: Keep an eye out for common pests like aphids and caterpillars. Use organic pest control methods to manage infestations. Monitor for signs of diseases such as powdery mildew and take preventative measures if necessary.
  6. Harvest Regularly: Peas are best when harvested young and tender. Regularly pick the ripe pods to encourage continuous production.


snap peas for aquaponics

Caring for Pea Plants

A.Monitoring Water Quality

Monitoring the water quality in your aquaponics system is essential to ensure the health and vitality of your fish and pea plants:

  1. pH Levels: Regularly check the pH levels of the water to ensure they are within the optimal range for both fish and plants (typically 6.0 to 7.0 for peas). pH fluctuations can stress your plants and affect nutrient availability.
  2. Ammonia and Nitrate Levels: Continuously monitor ammonia, nitrite, and nitrate levels in the water. Ammonia and nitrite should be kept at low, non-toxic levels for fish (ideally near zero), while nitrates should be maintained at levels conducive to plant growth.
  3. Temperature: Keep an eye on water temperature, as it can affect the growth rate of both fish and plants. Peas prefer cooler temperatures, so ensure that the water doesn't become too warm, especially during the summer months.
  4. Oxygen Levels: Maintain proper oxygen levels in the water to ensure fish health and promote robust root development in pea plants. Adequate aeration and water circulation are essential for oxygenation.

B.Pest and Disease Management in Aquaponics

Pest and disease management in aquaponics systems primarily involves preventative measures, as well as organic and non-chemical solutions:

  1. Isolation: Isolate any infected or infested plants immediately to prevent the spread of pests or diseases to other plants in the system.
  2. Companion Planting: Consider planting companion plants that repel common pests or attract beneficial insects. For example, marigolds can deter aphids, while beneficial insects like ladybugs can help control pest populations.
  3. Physical Inspection: Regularly inspect your pea plants for signs of pests or diseases, such as discolored leaves, wilting, or unusual growth. Early detection allows for quicker intervention.
  4. Organic Pest Control: Use organic methods to manage pests, such as neem oil, insecticidal soap, or introducing beneficial insects like ladybugs and lacewings.
  5. Hygiene: Maintain good hygiene practices, as cleanliness helps prevent the buildup of debris and organic matter that can harbor pests and diseases.

C. Harvesting Peas

Harvesting peas at the right moment is crucial to enjoy their sweet, tender flavor and maximize the quality of your crop. Here's how to determine when peas are ready for harvest in your aquaponics garden:

  1. Pod Appearance: Observe the pods closely. Garden peas are typically ready for harvest when the pods are well-filled and plump but have not yet become overly mature or swollen. You'll notice the pods are firm and bright green.
  2. Taste Test: The best indicator of readiness is taste. Sample a few peas from different parts of the plant. If they are sweet, crisp, and flavorful, it's time to start harvesting.
  3. Visual Clues: Look for visual clues on the plant. Pods that are mature and ready for harvest will be slightly rounded and filled out. Avoid harvesting when the pods are flat or underdeveloped.
  4. Timing: The timing for pea harvest can vary depending on the specific variety, weather conditions, and temperature. Typically, garden peas are ready to harvest about 60-70 days after planting. Snow peas and snap peas may be harvested earlier when the pods are still flat and before the peas inside fully mature.

Maximizing Pea Production in Aquaponics

To maximize pea production in your aquaponics system and enjoy a continuous harvest, consider the following tips:

  1. Succession Planting: Plant new pea crops every few weeks to stagger the harvest. This ensures a consistent supply of fresh peas throughout the growing season.
  2. Proper Pruning: Regularly prune the pea plants to remove dead or unproductive growth. This encourages the plants to channel their energy into producing new pods.
  3. Nutrient Management: Maintain proper nutrient levels in your aquaponics system to support healthy pea growth. Ensure that nitrates, phosphates, and potassium are within the appropriate ranges.
  4. Pest and Disease Control: Continue to monitor for pests and diseases and manage them promptly to prevent damage to the plants and reduce stress on the pea crop.
  5. Optimal Growing Conditions: Maintain ideal growing conditions for your aquaponics system, including proper temperature, lighting, and water quality, to encourage vigorous pea production.


Growing peas in an aquaponics system offers an exciting and sustainable way to enjoy fresh, sweet, and nutritious peas year-round. Harvesting your peas at the peak of ripeness and troubleshooting common issues are essential skills to ensure a bountiful and delicious harvest. Remember to maintain proper water quality, nutrient levels, and a balanced system to foster healthy plant growth and thriving fish populations.

By following the steps outlined in this guide and applying your newfound knowledge, you're well on your way to reaping the rewards of a flourishing aquaponics garden abundant in delicious peas and a harmonious ecosystem. Happy gardening!

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