June is when things really start to take off in the greenhouse. The sunlight is strong, the days are long, and plant growth shifts into overdrive. But just as the growing season ramps up, so do the demands on your greenhouse setup. From rising temperatures to increased pest activity, a little prep work now can make all the difference.
Here's how to get ahead so you can enjoy a productive and low-stress month inside your greenhouse.
With summer on the horizon, temperature control becomes a top priority. Even in northern climates, greenhouses can overheat on sunny days. take time to check that your ventilation systems are running smoothly:
If any of these systems are slow to react of not opening fully, it's a good time to recalibrate.
If you haven't added shade cloth yet, consider it. June sun can be intense, especially if your greenhouse has full exposure. Shade cloth is a simple and effective way to reduce heat buildup and protect sensitive plants from scorching. Whether you need full coverage or just want to shade one section, there's a solution that can fit your frame.
As the weather warms, your plants' water needs increase—fast. If you're relying on a drip irrigation system or misting lines, give them a quick check for blockages, leaks, or inconsistent coverage. Hot spots or overly dry areas can lead to stress, especially during fruit set or flowering.
For those who water by hand, consider how long your routine is taking. It make be time to upgrade to a timer system or divide zones to make your efforts more efficient. Watering early in the morning remains the best approach, helping to reduce evaporation and give plants the moisture they need before the heat sets in.
Warmth and humidity create ideal conditions for pests to thrive. Aphids, whiteflies, and spider mites are especially common in greenhouses during this time of year. Instead of waiting until you see damage, make a habit of walking the greenhouse each morning with a quick visual scan. Check new growth and the undersides of leaves where pests often hide.
It's also a good time to tidy up. Remove plant debris, spent flowers, and dead leaves to improve airflow and reduce disease risk. If you're noticing persistent issues, insect screening or integrated pest management solutions can offer peace of mind without the need for harsh chemicals.
With everything growing faster, your plants need more than just sunshine and water. June is the time to start a consistent feeding schedule. Whether you use a liquid fertilizer or a slow-release option, aim for a balanced formula that supports both foliage and fruit development.
Pay attention to structural support too. Tomatoes, cucumbers and other vining plants need tying or trellising to stay upright and productive. A well-supported plant is less likely to suffer from broken stems or poor air circulation, and it makes harvesting easier down the line.
As your early spring crops start to wrap up you'll likely have room for something fresh. This is a great time to replant with heat-loving varieties like basil, eggplant, peppers, or melons. If you're rotating crops, keep companion planting in mind to boost productivity and keep pests in check naturally.
This is also a great time to experiment. Try a new variety you've never grown before, revisit an old favorite, or grow something entirely for fun—like cut flowers or herbs you can use in the kitchen. Greenhouses make it easy to extend your season and get creative with your planting choices.
June is a good time to give your greenhouse a thoughtful check-in. While our structures are built to last, a little seasonal attention helps everything perform at its best.
Take a walk around and look for small adjustments you can make:
It's also the perfect time to clean your glazing. Over the spring months, dust and pollen can build up, blocking valuable light. A gentle clean with soapy water and a soft cloth can brighten your space and improve conditions for plant growth.
Preparing your greenhouse for June doesn't need to be a major overhaul. It's about checking in, making small adjustments, and staying one step ahead of the season. With the right care, your greenhouse will carry you into summer strong. Full of thriving plants, healthy crops, and fewer surprises.
If you're looking for tools to make June growing easier, we've got you covered. From shade cloth to ventilation upgrades, our accessories are designed to support your success. Not sure what you need? Our team is always happy to help.