Hypericum Ascyron

To properly water the Great St. John's wort, it is recommended to use filtered water at room temperature. Tap water may contain harmful particles, so filtered water is preferred. It is important to use water that is at or slightly warmer than room temperature, as the plant is accustomed to a warm environment, and cold water can be a shock. Avoid watering from above, as this can cause problems with the foliage. Instead, gently pour filtered room temperature water onto the soil until it is fully saturated. This helps moisturize the roots and allows them to spread and absorb nutrients from the soil.

Fertilization is important for the Great St. John's wort because it provides essential nutrients for the plant's growth above and below the ground. However, the plant's fertilization needs are relatively low, and it can survive without fertilization in some cases. Nonetheless, annual fertilization can greatly benefit the plant, helping it to thrive and produce better, longer-lasting flowers. Therefore, those wanting their Great St. John's wort to look its best should prioritize regular fertilization.

Great St. John's wort needs full sun every day, with a minimum of six hours of sunlight to keep its leaves, roots, and blooms healthy. While most perennials also require six hours of sunlight per day, the Orange Daylily or Giant Coreopsis can survive on as little as three hours of sun. However, these plants won't thrive as well in less sunny conditions as they would in full sun.

The best temperature for Great St. John's wort depends on the time of year. Let's talk about the two main seasons: the growing season and the dormancy season. During the growing season, when the plant is sprouting, the ideal temperature range is 65-80℉ (18-27℃). If it gets colder than 15℉ (-10℃), the plant might struggle, with leaves browning and wilting. However, if it's just a short cold snap, Great St. John's wort can survive with some help. In the warmer parts of the year, the plant needs protection from extremely high temperatures. Anything above 95-105℉ (35-40℃) can harm the foliage and blooms. High temperatures can cause wilting, drooping, and even sunburn on the leaves, making it hard for the plant to recover. Fortunately, there are quick and easy ways to combat this issue!

Both overwatering and underwatering can harm the health of your Great St. John's wort, but overwatering is more common. When this plant gets too much water, its stems and leaves may wilt and turn yellow. Overwatering for a long time could also lead to deadly diseases like root rot, mold, and mildew. Underwatering is less likely because the Great St. John's wort can handle drought quite well. However, it is still possible, and when it happens, the leaves will become brittle and brown. It's crucial to notice signs of overwatering early when taking care of your Great St. John's wort. Some diseases caused by overwatering, like root rot, cannot be fixed if you wait too long. If you see early signs, reduce your watering immediately. Also, check the soil quality where your plant is growing. If it drains poorly, replace it with loose, well-draining potting mix. If you notice signs of underwatering, simply water your plant more regularly until the signs go away.

The best time to fertilize a Great St. John's wort is in late winter to early spring when it is transitioning from its dormant phase to a phase of active growth. Fertilizing during this time promotes healthy growth and sets the plant up for a successful season. Although early spring is generally the most beneficial, fertilizing in the fall is also acceptable. However, it is not recommended to fertilize during summer or winter.

In warm climates, some Perennial Flowering Plants may struggle with excessive heat and suffer from sun damage. They can wilt, dry out, or even experience growth problems if they are consistently exposed to the intense afternoon sun. However, not all plants require protection from the light afternoon sun. For those that are harmed by intense afternoon exposure, it is recommended to provide them with some shade in warmer climates. Gardeners can achieve this by planting these plants in areas that do not receive direct heat during the afternoon, such as under trees or behind bushes.

If you are planting a new Great St. John's wort, especially if it's the first year, it will require extra care during the coldest months. Frost can be particularly damaging to a young plant like this and may prevent it from growing back in the spring. To protect it, make sure the temperature stays above 40℉(5℃) by either bringing it indoors for a month or two, or using mulch or fabric barriers to shield it from frost. It's also a good idea to plant it in a shadier spot during the first year or two, as smaller and weaker plants have a harder time regulating their temperature in the heat. Limit sun exposure to no more than five hours per day, especially if the temperature rises above 80℉(27℃). To keep it cool in the summer, use shadecloth and water or mist it frequently.

To determine if your potted Great St. John's wort needs water, simply insert your finger into the soil. If the top two to three inches are dry, it's time to water. The same method applies for outdoor plants in the ground. Check the top few inches of soil and if it's dry, water the plant. Typically, watering once a week is sufficient during spring and early fall. However, during hot weather, you may need to water twice or more per week. It's worth noting that mature Great St. John's wort plants can tolerate drought well.

To properly care for your Great St. John's wort, it is important to know when to fertilize. Late winter and early spring are the only suitable times for fertilization, as this plant has low fertilization needs and one annual feeding is sufficient. Overfertilization can occur if you continue to fertilize throughout spring, summer, and fall, so it is best to avoid it during these seasons. However, if you skipped fertilizing in spring, it is acceptable to feed the plant in fall. Additionally, it is unnecessary to fertilize during winter when the Great St. John's wort is in a dormant growth phase and not producing new growth. Therefore, fertilizing during most of the winter is not recommended.

Certain perennial plants require ample sunlight to reach their maximum bloom. However, in warmer climates, some of these plants actually benefit from less sun. For instance, individuals residing in hotter regions might find it beneficial to shade their flowering perennials during the intense afternoon sun, especially during summer months. Although many perennial flowering plants prefer partial shade in the hottest climates, there are exceptions. Take the Giant Coreopsis, for example, as it is not bothered by excessive sun exposure. These plants can flourish even when placed in the full sun during scorching weather.

During the growing season, if temperatures drop below 15℉(-10℃), there are measures you can take to protect Great St. John's wort from frost or cold damage. If you're growing it in a container, simply bring it indoors with bright, indirect light until temperatures rise above the lower threshold. For ground-planted Great St. John's wort, use mulch or horticultural fabric to create a barrier around the plant to shield it from frost and cold wind. In hot temperatures above 80℉(27℃) during the day, be cautious with sunlight exposure. Limit Great St. John's wort to six hours or less of sunlight per day, preferably in the morning. Setting up shade cloth or a fine plastic mesh can reduce direct sunlight during the hottest parts of the day. Additionally, installing a misting system can release cooling mist around the plant's base to lower ground temperatures.