Some Tips on Helping Cattleya Orchids Survive the Summer
Are you curious about some small tips on caring for the succulent Cattleya orchid, especially on how to help it survive the summer? Here are some detailed answers for you.
Some Tips on Helping Cattleya Orchids Survive the Summer – I've been growing Cattleya orchids for several years now, but I feel like I'm not doing a great job, especially in terms of summer care. Often, the plants thrive in spring, but by summer, their leaves become dehydrated and wilted, looking limp and listless. By autumn, their recovery is slow, which severely affects their flowering the following year. In severe cases, they fail to recover in autumn and become even more dehydrated, resembling paper, making it difficult to save them.
The main reason for this is over-attention, as the saying goes, "Too much love can be harmful." This year, I've improved some methods and seen some results, with less leaf dehydration and the plants looking sturdy. I estimate they will start growing quickly once the weather cools in autumn. Here are some tips, mostly inspired by others' practices, which I would like to share with fellow Cattleya enthusiasts.
1. Watering and Spraying
This is the main point I've focused on improving this year. Some books say to water and spray more in summer, while others suggest being more conservative with watering and spraying more. However, it seems that it's essential to consider the temperature and ventilation conditions. In fact, it's hard to get it right. In summer, especially in the north, the highest temperatures often exceed 30 degrees Celsius with minimal temperature variation. This reduces the orchids' photosynthetic capacity and their need for water, while the roots' vitality is insufficient to absorb excessive watering, leading to root rot and dehydrated leaves. Thinking back to how Cattleya orchids thrive in their native environment, with their roots in small tree holes and never flooded, even though it rains a lot in the summer, the most important thing is that they are not exposed to our extreme heat. My approach is to keep the soil slightly moist without fully saturating it. When it looks dry, I sprinkle a little water and leave it at that. I've also omitted spraying water, as it can easily lead to leaf rot on hot and humid days.
2. Fertilizing
It should be stopped by the end of May, for the same reason as watering. Fertilizing can be dangerous if not absorbed. I estimate it will be safe to start fertilizing again by the end of August.
3. Ventilation
Watering excessively is not the most lethal issue; as long as there is good ventilation, the harm caused by excess water will be significantly reduced. Conversely, even if watering is conservative, poor ventilation won't help. Therefore, it's best to place the Cattleya orchids in a naturally ventilated area, or use a fan if necessary. All plants originate from nature, and they will grow well if we can recreate their natural environment as much as possible. The natural breeze is irreplaceable. However, be careful of rain. Heavy rain followed by strong sunlight can kill even the toughest plants.
4. Sunlight
There's no need to overly shield them. As long as watering is moderate and ventilation is good, a bit more sunlight won't be a problem, even at high temperatures, and burns are rare. My two Cattleya orchids have been by the east window, getting about 3-4 hours of sunlight each day, and a few seedlings by the south window seem unaffected by strong sunlight.
Also, be sure to use larger particles of soil, adding more decomposed leaf soil, sifting out the dusty parts, and mixing in coal slag or broken bricks or coarse sand, or a combination of all.
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