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Barra suggests keeping the temperature between 65 and 75 degrees Fahrenheit for best results. ”Use a space heater if you’re in a cold area or a fan for heat waves,” he says.
Salad greens do best in cooler weather so pay attention to the indoor temperature. Many salad green seeds germinate when the temperature is between 50-70°F. Check the seed packet to know the ...
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Lettuce, for example, grows best in a pH of 5.6–6.0, EC of 1.1–1.4 dS·m −1, 17 mol·m −2 ·d −1 daily light integral which may consist of a combination of natural and supplemental lighting, air temperature of 24 °C day/19 °C night, water temperature of 25 °C, and dissolved oxygen of >7 mg·L −3.
A butterhead lettuce Prajzerica, a lettuce variety from Croatia. Seeds keep best when stored in cool conditions, and, unless stored cryogenically, remain viable the longest when stored at −20 °C (−4 °F); they are relatively short lived in storage. [1] At room temperature, lettuce seeds remain viable for only a few months.
Growing degrees (GDs) is defined as the number of temperature degrees above a certain threshold base temperature, which varies among crop species. The base temperature is that temperature below which plant growth is zero. GDs are calculated each day as maximum temperature plus the minimum temperature divided by 2, minus the base temperature.
Indoor sowing generally works best with slow-growing seeds that need plenty of time to mature before the harvest season, but it’s also a great option for heat-loving plants that won’t survive ...
The species displays optimal growth in the temperature range of 22–30 °C, but can endure extreme temperatures up to 35 °C. [12] As a result, Pistia stratiotes do not grow in colder temperatures, beyond the tropics of Cancer and Capricorn. The species also require slightly acidic water in the pH range of 6.5–7.2 for optimal growth.