When to Plant Tree Lupin Seeds

Tree lupins, also known as lupinus arboreus, are popular garden plants known for their beautiful, fragrant flowers and ability to attract pollinators. These plants are easy to grow from seeds – however, it is important to plant them at the right time to ensure healthy growth and optimal blooming. In this article, we will discuss when to plant tree lupin seeds for the best results.

Choosing the Right Time to Plant

Tree lupins are hardy plants that can grow in a variety of climates, but they do have specific temperature requirements for germination. Generally, tree lupin seeds will need a soil temperature of around 18-20°C to germinate and grow well.

If you live in a warmer climate, you can plant tree lupin seeds outside in the fall, around September or October. However, if you live in a cooler climate, it is best to start the seeds indoors in early spring – around March or April. This will give the seeds enough time to germinate and grow into healthy plants before the summer heat sets in.

Preparing the Soil

Before planting tree lupin seeds, it is important to prepare the soil properly to ensure healthy growth. Tree lupins prefer well-drained, slightly acidic soil with a pH between 6.0 and 7.5.

Start by tilling the soil to a depth of 12-18 inches and adding compost or other organic matter to improve soil quality. If your soil is too acidic, you can add lime to raise the pH level. If your soil is too alkaline, you can add sulfur to lower the pH level.

Planting Tree Lupin Seeds

Once your soil is prepared, it is time to plant your tree lupin seeds. If you are planting outside, choose a spot that receives full sun or partial shade. Dig small holes about 1/4 inch deep and place one or two seeds in each hole. Cover the seeds with soil and water gently, taking care not to displace the seeds.

If you are starting your seeds indoors, plant them in small pots or containers filled with potting soil. Plant the seeds about 1/4 inch deep and water gently. Keep the pots in a warm, well-lit area and water regularly to keep the soil moist.

Caring for Tree Lupin Plants

Tree lupin plants are easy to care for and require little maintenance. Keep the soil moist but not waterlogged, and fertilize with a balanced fertilizer every few weeks during the growing season. Prune the plants back after flowering to encourage bushier growth and more blooms the following year.

In conclusion, tree lupin seeds can be planted in the fall or early spring, depending on your climate. Make sure to prepare the soil properly and plant the seeds at the right depth. With proper care, your tree lupin plants will thrive and bloom beautifully year after year!