If your spring and early‑summer perennials are spilling over their space, producing smaller flowers, or even flopping with holes in the centers, they are signaling that it’s time to divide them. Crowded plants compete for water, nutrients, and sunlight, and limited airflow can invite mold and fungal diseases.

Why Divide and How Often

Dividing perennials every three to five years prevents the inevitable decline that comes from overcrowding. The reward? Healthier, more vigorous plants and a supply of free new specimens for other garden beds.

Not every perennial welcomes division. Species with woody crowns or deep taproots—such as lavender, Russian sage, butterfly weed, and Baptisia—generally do not respond well and should be left intact.

When to Divide

Timing depends on the plant’s bloom cycle. Late‑summer and fall‑blooming perennials are best divided in the spring, just after they emerge from the ground. Spring‑ and early‑to‑mid‑summer bloomers should be divided in the fall, once they have finished their active growth and no longer need stored energy for flowering.

In colder parts of Texas, aim to finish fall divisions four to six weeks before the first hard freeze. This gives the newly separated sections enough time to establish roots before winter dormancy.

Preparing for the Task

Choose a cool, cloudy day and water the plants deeply one or two days beforehand. This gives the soil a moisture boost and makes the roots easier to work with.

If the plant is tall, cut back the foliage to expose the crown—the point where the top growth meets the roots. This makes the division process smoother.

Dividing the Plant

Insert a garden fork about a foot away from the base of the plant. A spade works, but a fork tends to cause less damage to the root ball. Apply steady pressure to lift a section of the clump, then move the fork to the next spot and repeat until the entire root system loosens enough to lift the plant out of the ground.

Gently shake off excess soil to see the base of the shoots. For smaller, loosely rooted plants, you may be able to pull the sections apart by hand. Larger, overgrown clumps usually require a second fork placed back‑to‑back in the center of the root mass. Pull the handles in opposite directions until the clump separates into two or more pieces. Each new section should have healthy roots and at least three strong shoots.

Planting the Divisions

Dig planting holes immediately after division, or better yet, prepare them before lifting the plant. Make each hole wider than the root ball but only deep enough so the top of the root ball sits at or just above the soil line.

Place the division in the hole, backfill with soil, and tamp firmly to eliminate air pockets. Water thoroughly, but hold off on fertilizing until the plant shows new growth.

Apply a mulch layer around the base to retain moisture, suppress weeds, and moderate soil temperature through winter.

What to Expect

In the following spring, the newly planted divisions will emerge as stronger, more vigorous perennials with ample space to flourish. By repeating the division cycle every few years, you’ll keep your garden blooming abundantly year after year.

Original reporting: Texarkana Gazette — read the source article.