Lepidium Bonariense

Watering Argentine cress is easy and flexible. You can use a garden hose, watering can, or any other watering tool. This plant is not picky about the source of water and can thrive with rainwater, tap water, or filtered water. However, it is best to avoid overhead watering as it can damage leaves and flowers and even lead to disease. A drip irrigation system is often the most effective way to water Argentine cress, as it provides even and direct watering to the soil. If you have a container-grown Argentine cress, you can follow a similar approach but use a cup, watering can, or tap to water the soil directly.

Argentine cress thrives in environments with full sun, requiring above 6 hours of sunlight, but can tolerate partial sun, about 3-6 hours of sunlight. It's beneficial to observe sunlight's movement through your garden to find spots providing a good balance of light and shade, ensuring the plants' well-being. Originating from bright, open environments, Argentine cress prefers direct sunlight for optimal growth, although it can manage in partial sun.

Underwatering Argentine cress is easily remedied by increasing the frequency of watering when you notice the plant lacks moisture. On the other hand, overwatering can be a more serious problem if left unnoticed. Overwatered Argentine cress can acquire diseases that can cause it to decline and eventually die. To prevent this, it's important to select a suitable location for growing the plant. This includes choosing a spot that receives ample sunlight to help dry the soil and ensuring there is proper drainage to prevent water from pooling and causing waterlogged soil. If you have overwatered Argentine cress in a pot, it may be necessary to move it to a new pot if the previous container did not have good drainage or enough drainage holes. When repotting the overwatered plant, it is important to use loose soil and a pot that drains effectively.

When natural sunlight is insufficient, especially during winter or in less sunny spaces, artificial lighting becomes essential for Argentine cress's growth indoors. LED lights are preferred for their ability to mimic specific wavelengths needed by the plant. Full sun plants require 30-50W/sq ft, partial sun plants need 20-30W/sq ft, and full shade plants 10-20W/sq ft of artificial light. The lights should be placed 12-36 inches above the plant to mimic natural sunlight and turned on for 8-12 hours daily according to the plant's natural daylight needs.

To keep your Argentine cress healthy, it's important to water it regularly throughout the growing season. In the spring, watering once a week should be sufficient. However, as the season progresses and it gets warmer, you may need to water it two to three times a week. Be careful not to overwater, as this can be harmful to the plant. Regardless of how often you water, make sure the soil remains moist but not soaking wet. If your Argentine cress is in a pot, you'll need to water it more frequently. Soil in pots tends to heat up and dry out faster than ground soil. In most cases, watering a potted Argentine cress a few times a week should do the trick, as opposed to just once a week for an in-ground plant.

Signs of light deficiency in Argentine cress include smaller new leaves, leggy or sparse growth, faster leaf drop, slower or halted growth, pale or irregularly colored new leaves due to lack of chlorophyll and nutrients, chlorosis or yellowing of leaves, sunscald resulting in pale or necrotic areas on plant tissue, leaf curling as a means to reduce surface area exposed to intense sunlight, wilting due to loss of turgor pressure, and leaf scorching characterized by brown, crispy edges or patches on leaves.

Determining the appropriate amount of water for your Argentine cress can be approached in a few ways. Some gardeners prefer to gauge the soil's moisture level by feeling it, suggesting that watering should continue until the first six inches of soil feel damp. Another option is to use a specific measurement, such as around two gallons per week, while considering factors like heat and soil dryness. However, adhering strictly to these guidelines without considering individual plant needs may result in overwatering. When growing Argentine cress in a container, a different method is needed. In this case, you should water until all layers of dry soil are moistened, which can be checked by feeling the soil with your finger or observing a slight trickle of excess water from the pot's drainage holes.

For indoor plants struggling with insufficient light, gradually move them each week towards a sunnier location until they receive at least 6 hours of direct sunlight daily, utilizing a south-facing window and keeping curtains open. If moving the plant isn't feasible, use artificial lighting such as desk or ceiling lamps for at least 8 hours daily or invest in professional grow lights. Outdoors, adapt plants to more sunlight gradually to prevent sunburn. Removing obstructions and transplanting to sunnier locations can also aid in exposure. Note that parts of the plant already affected may not recover, but new growth will be healthy with increased light.

Avoiding overwatering your Argentine cress can be a bit challenging. On one hand, these plants need to have their deep roots moistened weekly. But on the other hand, they are highly prone to root rot and may turn brown if overwatered. Underwatering is less of a concern as Argentine cress can survive for a while without extra watering, but prolonged lack of water will cause wilting and dry leaves.

As the season progresses, the water needs of your Argentine cress will increase. In spring, watering once a week should be sufficient. However, as summer arrives and temperatures rise, you may need to water your Argentine cress more frequently, even up to three times a week. This is especially important if your Argentine cress is growing in a container, as the soil in containers tends to dry out faster in warm weather. In autumn, when your Argentine cress is still blooming, it may require less water since the temperature has likely cooled down and the sun is not as intense as it was in summer.

Throughout the year, Argentine cress goes through various growth stages, each with different water requirements. When starting with seeds, give more water during germination to maintain soil moisture. As the plant grows above the soil, slightly reduce watering. Once mature, water once a week, but consider giving slightly more water during flower development.

Argentine cress is primarily grown outdoors for a few reasons. Firstly, these plants tend to grow tall, making them more suitable for outdoor spaces. Additionally, Argentine cress requires more daily sunlight than most indoor locations can provide. If you do manage to create a suitable indoor growing environment, you may need to water your Argentine cress more frequently compared to outdoor growing. This is mainly due to indoor locations being drier because of HVAC units, as well as soil in containers drying out quicker than soil in the ground.