Overview of the Experiment
In our ongoing germination trials, we aimed to assess how temperature and seed supplier differences impact seed germination. For this experiment, we used a simple but effective technique: damp paper towels partially sealed in ziplock bags. The seeds were stored in a small box for darkness and subjected to two temperature zones:
Room Temperature: 21°C during the day, 20°C at night.
Warm Temperature: 26°C during the day, 20°C at night (on light for heat).
Seeds were started on June 16th, and results were collected on June 24th, providing an 8-day window for germination. The seeds came from Johnny's Seeds and West Coast Seeds, focusing on spinach, lettuce, and Swiss chard varieties.
Results
Key Takeaways
Cool Temperatures Favor Lettuce: Both Coastal Star and Jerricho Babyleaf Lettuce performed well at room temperature, with success rates of 87.5%. However, warm temperatures significantly reduced germination, with Jerricho Babyleaf showing a complete failure at 26°C.
Warmth Benefits Swiss Chard: Swiss chard varieties (Silverado and Canary Yellow) demonstrated their preference for warmer temperatures, with nearly perfect germination rates of 88.89% and 100%, respectively, in the warm zone.
Spinach Performs Moderately: Spinach germinated decently under room conditions (80%), but warm temperatures seemed to reduce its success (47.06%).
Looking Forward
Now that our seedlings are ready for transplanting into a hydroponic system, we'll be using the Kanana Gardens App to help determine the ideal nutrient mix for each plant variety.
For the next round of trials, we'll be experimenting with direct germination using popular countertop systems like the iDOO, Aerogarden, and Click n' Grow.
Stay tuned for more updates as we continue our trials!