Cucumbers grown in greenhouses with substrate
February 5, 2025
Cucumber grown in greenhouses with substrate，The main reason for excessive elongation of the lower cotyledons of cucumber seedlings grown in substrate is that the light radiation in the greenhouse does not match the microclimate parameters.
This is the result of the combined effect of higher temperatures and low light radiation when growing seedlings. Here you need to follow the following rule: the less light radiation, the lower the air temperature. Do not be afraid to maintain lower temperatures during the seedling stage of cucumber planting.
Another case: In order to limit the elongation of the lower cotyledons, agronomists use a full-day uninterrupted lighting system for the first 3 days after germination. However, excessive lighting inhibits the growth of cucumber planting.After this stage, cucumbers need time to recover. Cucumber seedlings do not need a lot of light. At the same time, this does not take into account economic factors. Conclusion: 24-hour artificial lighting of cucumber seedlings after germination increases costs and harms the plants. In the beginning, young plants do not need a lot of light, so the light for cucumber seedlings starts from 12-14 hours a day. As the cucumber grown and approach planting, cucumber grown need more and more light, and the light time is gradually increased to 20 hours a day. Especially when the leaves at the top of the plant begin to clamp. (Please note that in large greenhouses, most of which are equipped with supplemental lighting systems, plants rely on the supplemental lighting system to produce in winter. Compared with greenhouses without supplemental lighting systems, the planting strategy may be different)
