Greenhouse Growing Guide: Zucchini, Cucumbers

Cucumbers and zucchinis are both easily grown in home greenhouse conditions. Both germinate within two or three days when the ambient air temperature in the greenhouse is between 80 and 85 degrees Fahrenheit.

Most people use their home greenhouses to start these particular vegetables for transplanting outdoors, but they can also be raised strictly in greenhouse conditions. If you choose to do this, buy seeds of varieties that were developed for growing in greenhouses. Mini cucumber and zucchini varieties perform better and are easier to handle in a greenhouse environment.

Cucumbers and zucchinis that you grow in your home greenhouse should be placed in bright light and given plenty of room to grow. In a small greenhouse, you may only have room for one plant since they need to be spaced at least seven feet apart. Fortunately, these plants are so prolific that all it takes is one plant to provide for the needs of the average household. It's also possible to grow them in a greenhouse during the winter.

Watering and Fertilizing

Cucumbers and zucchinis require consistently moist soils, making them excellent candidates for drip irrigation systems. You can also use this system to fertilize your cucumbers and zucchinis. Both of these require a great deal of potassium and nitrogen, particularly when they're in the process of fruiting.


Cucumbers and zucchinis do best when daytime temperatures remain between 75 and 80 degrees Fahrenheit during the day and around 65 degrees at night. Temperatures outside of these ranges result in stunted growth and general nonperformance of the plants.


Harvesting times vary among varieties, so be sure to follow the directions for the specific seeds that you planted. Most types are ready to pick between 50 and 60 days after germination. As a general rule of thumb, they should be picked when they're uniformly green in color and firm to the touch. If you wait until they turn yellow to pick them, they may be too bitter to eat. Regular picking also helps promote increased production.


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