Resources & Germination Tips
Sprout and the Aurora+ perform a critical part of the germination process, but it is still only a part. The following tips can be used to maximize your success. Not all recommendations will work for all types of seeds. We encourage all customers to observe local laws regarding propagation and cultivation.
Seed Prep:
This method works for spherical seeds with a thick pericarp. It shouldn't be needed unless the seeds are old or improperly stored. Line a clean pill bottle or matchbox with fine grit sandpaper. Place your seeds inside and gently shake for 30-60 seconds. The goal is to make small scratches in the outer layer of the pericarp (shell) to help moisture penetrate. You can also lightly scrape the end of the seed on fine grit sandpaper using gloves to avoid contamination. Some use seed cracking tools. These processes should be used with caution and only when necessary.
Germination Solution:
Use tap water (varying by location), distilled water, a 1% hydrogen peroxide solution, an Epsom salt solution, or others. Be careful with tap water. Unless on well water, your tap water could contain too much chlorine. Leaving it out for 24-72 hours will let some dissipate. An air stone will speed the process and aerate the water. Well water (also varying by location) can have a higher pH, especially in areas with a lot of limestone. Distilled water is a sterile base and starts at a neutral pH of 7, but that can fluctuate, falling to around 5.8. Slightly acidic water can help break down the pericarp. A 1% hydrogen peroxide solution can help break through the shell, sanitize, and oxygenate. Combine 2 parts distilled water with 1 part hydrogen peroxide (3%). Epsom salt is an old-school method. Magnesium sulfate activates enzymes within the seed, starting germination. A solution of 1 tsp per gallon of water should be sufficient. Some customers use mycorrhizae products or something with humic and fulvic acids. Clean your unit before and after using such products.
Soaking and Placing Seeds:
Some like to soak their seeds for a few hours or an entire day, but this may have adverse effects depending on the seed type. Once seeds are placed on the cotton pads, add half of your germination solution. Place the top pad on and add the rest of your germination solution. Add 2-3ml per pod with the Aurora+ and 10ml per pod for Sprout. Press down the outer edges of the top pad to seal. You could also skip the cotton and place the seed directly into the pod. Use caution with solution amounts to avoid spilling and water damage.
Checking for Tap Roots:
Check every 12-24 hours for tap roots. This can take hours to weeks or months, depending on the seed type and age. Healthy, properly stored seeds usually germinate in 24-72 hours. Older seeds or those not stored properly can take 7-10 days. Certain types of pepper seeds can take weeks or months. Longer germination periods mean higher vulnerability. Research the conditions each seed prefers.
Check out our Seed Starter Milestones page.
Add more solution in small amounts, based on the environment (e.g., air temperature, relative humidity, circulation). The cotton pad should be saturated but not pooling, and never spilling over the sides of the pod.
Temperature Selection:
Temperature is based on the seed type and personal preference. Many seeds have a germination range of 70-90°F (21-32°C). The Aurora+ allows settings of 80-82°F (27-28°C) and 75-77°F (24-25°C). Sprout settings are 80-82°F (27-28°C) and 77-79°F (25-26°C).
Liability Disclaimer:
Root Nerds is not liable for any failed seed germination.
Many factors influence the outcome. Proper preparation, seed storage, and sanitation are key. Follow cleaning instructions and sanitize before and after each use to avoid damping off pathogens. It is your responsibility to select the proper temperature, amount of solution, and method for your seed type. Excessive removal of the lid can lead to temperature decrease and/or evaporation of your germination solution.
PCT International Patent Application No. PCT/IB2022/053634