sea holly

Sea holly is a drought-tolerant plant species, so it needs only moderate watering. Water this plant once or twice a week, allowing the soil to dry out between waterings, and making sure to never let the soil get soggy. Always check the soil's moisture level by poking your finger into the soil before you water. During the summer months, you may need to water more frequently to prevent the soil from drying out; during the winter months, you may need to reduce the frequency of watering. If the temperature drops below 40°F, stop watering altogether until temperatures rise again.

Sea holly (Eryngium planum 'White Glitter') prefers full sun to partial shade. For optimal growth, it needs at least 6 hours of direct sunlight every day. For best flowering, try to provide the plants with about 8 hours of direct sun. It is important to note that too much sunlight can actually be damaging to the plants, so if possible, it is best to provide some shading during the peak heat of the day (between 11am and 3pm).

Sea holly (Eryngium planum 'White Glitter') should be pruned back each year in the late winter or early spring when new growth begins. Cut the plant back to approximately 1-third of its total height, removing all of the old foliage and any weak, dead, or diseased stems or shoots. Pruning in this way will promote a more bushier, fuller-looking plant with more flowers and will encourage additional branching.