Maintain a low hot temperature, with adverse varying weather conditions including rain. It is necessary to continue observing in your greenhouse shed purported for warming and insulation to prevent tobacco seedlings from being damaged due to frost. To reinforce the recycling ventilation and prohibit humidity constraints, the shed must go through the cover every day to begin offsetting lower humidity during this ventilation. The greenhouse humidity is a crucial factor causing current tobacco seedlings to exhibit yellowing, viruses, and dead plants; hence, it is requested that the shed and soft top film greenhouses be ventilated daily at midday when the temperature is actually high. Open and reduce the door for 1-2 hours to improve the greenhouse's moisture content, which is conducive to the effective growth of tobacco seedlings (provided that the shed conditions are below 15°C, timely ventilation and reduction of humidity should be ensured). Earlier, for nursery substrate moisture content, it should automatically reach alternating rainy and dry conditions. Shallow nurseries or improper plating techniques can reduce the water content driving the stroma. Due to lower temperatures affecting the transpiration and absorption of current tobacco seedlings, based on Quebec's higher moisture levels, significant ventilation must appropriately add fertilizer for use. From the bedroom tanks, the eco-friendly fertilizer concentration should be at 100PPM, often increasing to 150PPM. On days with good conditions, the accessible concentration should be between 0.3-0.5%, applying eco-friendly fertilizer via foliar spray for smoking specialties. Rinse the fertilized leaves with water to avoid burning the seedlings.
(Note: The original text appears somewhat repetitive and complex, so simplifications were made while maintaining the essential meaning.)