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Shrimp Plant Seeds:
Guide to Storing, Sowing and Germination

Updated: June 28, 2023

Shrimp plants (Justicia brandegeana) are beautiful flowering plants that can add a splash of color to any garden. These plants are native to Mexico and are named for their unique flowers that resemble shrimps. If you have a shrimp plant in your garden, you may want to consider propagating it through seeds. In this article, we will guide you on how to store, sow, and germinate shrimp plant seeds successfully.

Storing Shrimp Plant Seeds

Before you can sow shrimp plant seeds, it is essential to store them properly. Here are some steps you can follow:

  1. Harvesting: The first step is to harvest the seeds from the shrimp plant. Wait until the flowers start to fade and produce seed pods. The seed pods will turn brown when they are ready for harvesting.

  2. Collecting Seeds: Once the seed pods have turned brown, gently squeeze them to release the seeds. Collect the seeds in a container or envelope, making sure to remove any debris or plant matter.

  3. Drying: After collecting the seeds, spread them out on a clean paper towel or plate. Allow them to air dry for about two weeks in a cool, dry place.

  4. Storage Container: Once the seeds are completely dry, transfer them to an airtight container such as a glass jar or plastic bag. Make sure the container is clean and dry before placing the seeds inside.

  5. Labeling: Don’t forget to label the container with the date of harvest and the plant’s name. This will help you keep track of when the seeds were collected and ensure you use them within their viability period.

  6. Storage Conditions: Store the container with the shrimp plant seeds in a cool, dark place such as a refrigerator or cellar. The ideal temperature for storing shrimp plant seeds is around 40°F (4°C). Ensure that the storage area is free from moisture and pests.

By following these steps, you can store shrimp plant seeds for up to two years while maintaining their viability.

Sowing Shrimp Plant Seeds

Once you are ready to sow the shrimp plant seeds, follow these guidelines:

  1. Soil Preparation: Choose a well-draining potting mix that is suitable for seed starting. You can also mix equal parts of compost, peat moss, and perlite to create a homemade seed starting mix. Fill small pots or trays with the prepared soil, leaving about half an inch of space at the top.

  2. Sowing Depth: Shrimp plant seeds are tiny, so they should be sown very shallowly. Gently press the seeds onto the soil surface without covering them completely. Lightly mist the seeds with water using a spray bottle.

  3. Watering: Keep the soil consistently moist but not overly wet. Using a spray bottle or a misting nozzle on a watering can will help prevent overwatering and disturbance of the seeds.

  4. Light and Temperature: Shrimp plant seeds require bright indirect light for germination. Place the pots or trays in a warm location where they will receive sufficient light but not direct sunlight. The ideal temperature for germinating shrimp plant seeds is around 70°F (21°C).

  5. Germination Time: Shrimp plant seeds typically germinate within two to four weeks, but it may take longer in some cases. Be patient and continue providing the right growing conditions until you see tiny seedlings emerging from the soil.

Germination Tips

To increase your chances of successful germination, consider these additional tips:

  • Pre-soaking: Some gardeners find success by pre-soaking shrimp plant seeds for 24 hours before sowing. This can help soften the seed coat and promote faster germination.

  • Bottom Heat: Providing bottom heat using a heating mat or placing the pots on a warm surface can speed up germination.

  • Humidity: Covering the pots or trays with a clear plastic bag or a propagation dome can create a humid environment that promotes germination. Remove the cover once the seedlings start to emerge.

  • Transplanting: Once the shrimp plant seedlings have developed a few sets of true leaves, they can be transplanted into larger pots or directly into the garden. Harden off the seedlings by gradually exposing them to outdoor conditions before transplanting.

By following these guidelines and tips, you can successfully store, sow, and germinate shrimp plant seeds. Enjoy watching your shrimp plants grow and flourish in your garden, adding unique beauty and charm to your outdoor space.