Summer can be a tough time to garden. The heat is challenging to many plants. Coupled with dry weather, it pulls the moisture right out of the ground and wilts leaves and stems. Paired with humidity, high temperatures may stress plants and foster fungal diseases.
But never fear! Gardens can continue to be productive in the hot summer months!
Here’s how to keep your plants in peak health despite the heat:
- Water deeply and infrequently, but regularly. It stands to reason that plants will need regular watering in the heat of summer. However, it is important to avoid weakening them by watering shallowly and thus encouraging their roots to grow near the surface. By watering deeply and allowing the surface of the ground to dry out in between waterings, the plants will put down extensive root systems less prone to damage from rapid soil moisture evaporation.
- Mulch. Mulch helps the soil retain moisture longer. This will allow to you water less frequently, and will help protect the plants from stress due to water deprivation. In a hot, dry, windy summer, an unmulched garden may literally require watering every day, and even that may not keep it alive.
- Protect cool-season plants with shade cloth. Still have broccoli or lettuce persisting through the summer heat? Increase your chances of a successful harvest and give these cool-weather plants a helping hand by shading them from the intense sun. Shade cloth is sold specifically for this purpose.
- Avoid excess nitrogen. Heat and humidity promote plant diseases, and so does excess nitrogen. A quick boost of nitrogen will indeed result in large, lush plants, but there are hidden side effects. The new cells grow very quickly, resulting in soft tissue susceptible to the invasion of pathogens. If your plants need nitrogen, apply it in a slow-release form, such as compost or well-rotted manure.
- Grow vines vertically for better airflow. Not only do sprawling vines take up space and promote weed growth, they are prone to disease and attract insect pests looking for a hiding place. Growing vertically exposes the entire plant to light and air. While this means that it will require more water (again, a mulch is recommended here), the trade-off is typically beneficial because the plant is healthier overall.
- Pull dead and dying plants. Not every plant will be able to keep going through the summer. Leftover cool-season plants will succumb, and even some hot-weather plants, such as bush beans, will eventually reach the end of their productive lives. Trying to keep dying plants going through the summer rarely produces miracles—in fact, it typically just attracts pests. Do the rest of your garden a favor and remove sickly vegetables.
With these tips in mind, your garden can continue to produce bountiful harvests throughout the summer.