How to Grow an Acacia Tree
Acacia is a genus that has over 1000 species native to the temperate and tropical regions of the Americas, Europe, Asia, Africa and Australia. Acacia trees are also known as thorntrees or wattle trees, and they have a long history of being used for medicinal purposes, food and timber. There are several species grown from ornamental purposes; one of those being acacia dealbata, or Silver Wattle, which has silvery leaves and bright yellow flowers. Follow these instructions for growing an acacia in your yard.
Step 1: Preparing the Acacia Seeds
Propagating acacia trees from seed is fairly easy. Before you germinate the seeds you should nick the hard seed coat with a pin or sharp file, then soak it in near boiling water overnight. You could also buy seedlings from a gardening store to save yourself some time (if planting seedlings, skip to step 3). In general, germinating should start in February or March, so that the seedlings can be transplanted to yard in the summer (or whenever air temperatures are over 65 degrees F).
Step 2: Germinating Acacia Seeds
Plant seeds in a seed tray with seed mix (purchase or mix from 3 parts river sand and 1 part peat moss). Plant about ¼ inch apart and ¼ inch deep. Place the tray in a humid, warm environment that is partly shaded. Keep the soil moist by misting regularly. Germination should occur anywhere between several days to a month.
Step 3: Transplanting Acacia Seedlings
After seedlings have reached over an inch tall, transplant each to its own 3-inch container. Place several handfuls of rocks on the bottom of the container to help with water drainage. Acacias prefer well-draining soil and a full day of sunlight, but the seedlings will need to be introduced to sunlight gradually. Start first by placing near a window for just a couple hours of morning sun a day. Be sure to water only when the top couple inches of soil is dry. Acacias prefer a dry environment, and overwatering will be detrimental.
Step 4: Transplanting Acacias to the Yard
Acacias don't make good container trees, so transplant to the yard as soon as the temperature is consistently above 65 degrees. Their root system develops quickly, so if possible plant it in a permanent position where it has the room to grow to its full height. If the quickly growing roots have began to curl, trim the curls back. Dig a hole twice the size of the pot and fill back with soil to the original level.
Step 5: Caring for Acacias
If you live in a dry climate, water about once a week until the tree is mature. Mulch can be applied to help keep soil moist but keep mulch away from the trunk and stems as this may cause rot. A low nitrogen fertilizer like a standard bonzai fertilizer can be used. Prune tree in the autumn after it is done blooming.
Follow these steps to grow a healthy and beautiful acacia tree!