Greenhouse irrigation setup, climate control, and growing systems
You walk into a greenhouse and every plant gets exactly the same amount of water. The tomatoes in the back corner, the basil on the middle bench, the seedlings on the propagation table. Same dripper flow rate, same run time,…
Nobody starts seeds planning to lose a third of them. But walk through enough propagation greenhouses in February or March and you’ll see the same story: trays of limp, collapsed seedlings, stems pinched at the soil line like someone squeezed…
I walked into a greenhouse in southern Spain a few years ago that smelled like a basement after a flood. The floor was slick with algae. Pots sat in trays of stagnant water. The grower was losing 15% of his…
A greenhouse without shade in summer is an oven with plants in it. I’ve walked into polyhouses in July where the thermometer read 42°C and every tomato leaf was curled like a fist. The grower had put off installing shade…
Most greenhouse advice tells you how to design cooling systems. Nobody tells you what to do at 2 PM on a Tuesday when the forecast said 34°C and your thermometer reads 42. That happened to a tomato grower I talked…
A greenhouse without ventilation is an oven. A greenhouse with the wrong ventilation is an expensive oven. I’ve walked into polytunnels in July where the temperature hit 52°C. Plants weren’t growing, they were cooking. The owner had spent serious money…
Most greenhouse growers spend their first year tweaking irrigation schedules by feel. The second year, they figure out the real variable isn’t the crop or the climate controller. It’s what the plants are sitting in. The growing medium you pick…
If you’ve walked through a commercial greenhouse lately, you know the irrigation isn’t one-size-fits-all. Some growers run thin films of nutrient solution down sloped channels. Others pump it through spaghetti tubes to individual pots. A third group fills buckets with…
Most greenhouse operators spend a lot of time thinking about their irrigation schedule, their fertilizer ratios, and their substrate moisture levels. Almost nobody thinks about what’s swimming in their water until a crop goes down with Pythium. I talked to…
A greenhouse at 38°C isn’t just uncomfortable. It’s expensive. Tomato pollen goes sterile above 32°C. Lettuce bolts. Cucumber leaves scorch. If your pad-and-fan system is struggling, every degree over target is yield you don’t get back. High-pressure fog systems have…
