When watering the One-cone clubmoss, you should aim to use filtered water that is at room temperature. Filtered water is better for this plant, as tap water can contain particles that are harmful to its health. The reason that the water should be at room temperature or slightly warmer is that the One-cone clubmoss comes from a warm environment, and cold water can be somewhat of a shock to its system. Also, you should avoid overhead watering for this plant, as it can cause foliage complications. Instead, simply apply your filtered room temperature water to the soil until the soil is entirely soaked. Soaking the soil can be very beneficial for this plant as it moistens the roots and helps them continue to spread through the soil and collect the nutrients they need.

Both overwatering and underwatering will be detrimental to the health of your One-cone clubmoss, but overwatering is a far more common issue. When this species receives too much water, its stems and leaves may begin to wilt and turn from green to yellow. Overwatering over a prolonged period may also lead to diseases such as root rot, mold, and mildew, all of which can kill your plant. Underwatering is far less common for the One-cone clubmoss, as this plant has decent drought tolerance. However, underwatering remains a possibility, and when it occurs, you can expect to find that the leaves of your One-cone clubmoss have become brittle and brown. It is crucial that you notice the signs of overwatering as soon as possible when caring for your One-cone clubmoss. Some of the diseases that arise from overwatering, such as root rot, may not be correctable if you wait too long. If you see early signs of overwatering, you should reduce your watering schedule immediately. You may also want to assess the quality of soil in which your One-cone clubmoss grows. If you find that the soil drains very poorly, you should replace it immediately with a loose, well-draining potting mix. On the other hand, if you find signs that your One-cone clubmoss is receiving too little water, all you need to do is water more regularly until those signs have subsided.

If your plant is in a pot. The most precise way to decide whether your One-cone clubmoss needs water is to plunge your finger into the soil. If you notice that the first two to three inches of soil have become dry, it is time to add some water. If you grow your One-cone clubmoss outdoors in the ground, you can use a similar method to test the soil. Again, when you find that the first few inches of soil have dried out, it is time to add water. During the spring and early fall, this method will often lead you to water this plant about once every week. When extremely hot weather arrives, you may need to increase your watering frequency to about twice or more per week. With that said, mature, well-established the One-cone clubmoss can show an admirable ability to withstand drought.

When it comes time to water your One-cone clubmoss, you should not be shy about how much water you give. With the first two to three inches of soil dry, this plant will appreciate a long and thorough watering. Supply enough water to soak the soil entirely. The amount of water you add should be enough to cause excess water to flow through the drainage holes at the bottom of your pot. If you don’t see excess water draining from the pot, you have likely underwatered your plant. But do not let the water accumulate inside the soil, which will be very dangerous to the plant as well. Alternatively, a lack of water draining through the pot could indicate poorly draining soils, which is detrimental to the health of this plant and should be avoided. If the plant is outside, 1 inch of rain per week will be sufficient.

The water needs of the One-cone clubmoss can change depending on growth stages as well. For example, when your One-cone clubmoss is in the first few years of its life, or if you have just transplanted it to a new growing location, you will need to give more water than usual. During both of those stages, your One-cone clubmoss will put a lot of energy towards sprouting new roots that will then support future growth. For those roots to perform their best, they need a bit more moisture than they would at a more mature phase. After a few seasons, your One-cone clubmoss will need much less water. Another growth stage in which this plant may need more water is during the bloom period. Flower development can make use of a significant amount of moisture, which is why you might need to give your One-cone clubmoss more water at this time.

The One-cone clubmoss will have its highest water needs during the hottest months of the year. During the height of summer, you may need to give this plant water more than once per week, depending on how fast the soil dries out. The opposite is true during the winter. In winter, your plant will enter a dormant phase, in which it will need far less water than usual. In fact, you may not need to water this plant at all during the winter months. However, if you do water during winter, you should not do so more than about once per month. Watering too much at this time will make it more likely that your One-cone clubmoss will contract a disease.

It is most common to grow the One-cone clubmoss indoors for any gardener that does not live in temperate and tropical regions. Those gardeners should consider the fact that soil in a container can dry out a bit faster than ground soil. Also, the presence of drying elements such as air conditioning units can cause your One-cone clubmoss to need water on a more frequent basis as well. if you planted it outside. When that is the case, it’s likely you won’t need to water your One-cone clubmoss very much at all. If you receive rainfall on a regular basis, that may be enough to keep your plant alive. Alternatively, those who grow this plant inside will need to water it more often, as allowing rainwater to soak the soil will not be an option.

One-cone clubmoss prefers cooler weather, and has a specific temperature range you can keep it within to maximize growth. For One-cone clubmoss to be as healthy as it possible can, you could keep them between the temperatures 65~75℉(18~25℃). One-cone clubmoss can handle higher and lower heat levels, but whenever possible, try to keep the area you grow them in within several degrees of 65~75℉(18~25℃). If you can’t keep One-cone clubmoss precisely within that range, it doesn’t mean they will stop growing. One-cone clubmoss can handle a higher and lower range before they begin to suffer damage or reduced growth. On the higher end, that temperature would that would fall between 75~85℉(25~30℃). On the lower end, One-cone clubmoss can handle temperatures as low as 5℉(-15℃). The higher temperature range is the most important to observe, as One-cone clubmoss prefers cooler environments. Letting temperatures get above the upper range may cause growth to slow, and having One-cone clubmoss above 85℉(30℃) could result in the plant dying.

Too much heat early in the growing stages of One-cone clubmoss may give it an unhealthy appearance, so it's important to keep your growing space between 65~75℉(18~25℃). You’ll want to stay in the colder part of this range as One-cone clubmoss, but make sure not to go below -5℉(-20℃). Extremely cold temperatures can hinder growth at any stage for One-cone clubmoss, though they aren’t nearly as damaging as extremely hot temperatures. If temperatures are kept high during the budding stage, One-cone clubmoss may not flower at all.

Tip #1: Grow in the Coldest Room of Your Home If you plan to grow One-cone clubmoss indoors, make sure to choose the coldest room of your home. This will usually be on the side of your house that doesn’t experience the harsh heat that the sun can produce in the middle of the day. At the same time, you’ll need to ensure the room does get a healthy amount of sunlight. While you’ll want to spare your plants from the brightest and hottest part of the day, zero sunlight can drastically reduce One-cone clubmoss ability to grow. Tip #2: If One-cone clubmoss Doesn’t Flower Properly, It May Be Too Hot The growing season for One-cone clubmoss, spring and early summer, can occasionally come with high temperatures. These fluctuations can negatively affect the growing stage of One-cone clubmoss, causing flowering buds to change into non-flowering buds. These buds will open partially, or in some cases not at all, causing One-cone clubmoss to lose some of its aesthetic quality. It's important to stay in the range of 65~75℉(18~25℃), for that reason, so your One-cone clubmoss can flower to its full potential. Tip #3: Avoid Frost While One-cone clubmoss can tolerate lower temperatures, as low as -5℉(-20℃), it will not do well if it encounters significant frost. If left out in the colder temperatures of late fall or winter, One-cone clubmoss will begin to show the signs of frost damage. To recognize the signs of frost damage, you’ll look for several key aesthetic changes. First, parts of One-cone clubmoss will begin to wilt. Then, those sections will start to become discolored, eventually turning brown or black as they die. Any parts of One-cone clubmoss that turn these colors cannot be saved, and will have to be pruned if you intend to keep the plant alive.

It's important to keep the temperature of your growing area steady regardless of season. If you live in an area with harsh winters or very hot summers, it may be best to put your plants inside. That way, you can keep them in a cool room where One-cone clubmoss would be able to grow in the best possible conditions. If you do leave your plants outside, make sure to observe the temperature closely. If the summer’s get especially hot in your climate-zone, make sure that your plants aren’t exposed to temperatures above 85℉(30℃). This will dehydrate and damage One-cone clubmoss quickly, and before long, they will begin to die.

If you intend to place One-cone clubmoss outside, you’ll want to make sure that it has shade from the heat of the midday sun. While One-cone clubmoss does need plentiful sunlight to grow to its full potential, direct sunlight can cause a rise in temperature and damage certain elements of the plant. Choose an area that has shade providing structures or tall trees that can shield One-cone clubmoss from the hottest parts of the day. If your climate isn’t appropriate for One-cone clubmoss or you don’t have the proper space in your garden, you can also plant them inside. Controlling the temperature is much easier indoors, and having proper fans, ventilation, or an A/C unit will allow you to stay within the optimum range of 65~75℉(18~25℃).