Dark Bigleaf Hydrangea

Hydrangea macrophylla Horben

Horben is a recent introduction to our Hydrangea collection and it has quickly become one of our favorites; it produces extra deep green foliage and the flower color is much darker purple than any other Hydrangea we grow. The plants are also nicely compact and will tolerate more sun than most other varieties. Horben also starts flowering heavily at a much younger age than most other Hydrangeas, even our one season old cuttings start producing full-sized blooms that are larger than the whole plant!

Like other Hydrangea macrophylla varieties, Horben's flower color will change depending on the pH of the soil. In neutral or basic soil, the flowers will be either purple or dark pink. If you want a pinker color then add some ground lime (available at most garden centers, nurseries, and big box stores). To encourage a deeper purple or bluer color you can add either coffee grounds or Aluminum Sulfate to bring the soil pH down.

Related Care Information

Packing Plants For Shipping

We pack our plants depending on the needs of each species and size, most plants ship best with the roots packed in moist sawdust or bark fines but some species don't like root disturbance and are shipped in a soil-less growing media.

Plant Sizes

Bamboo Plants Are Shipped In Their Containers

Bamboo roots are not flexible and so plants have to be shipped in their containers. These plants are heavier and are shipped separately from bare root plants. Because they are potted they can handle longer transit times so can ship via UPS Ground instead of USPS Air Mail. Potted plants can also be shipped year-round.

We regularly top our 1 gallon bamboo plants at 24-30 inches tall throughout the growing season. This results in dense, bushy foliage while allowing for economical shipping. From this size most running species will grow to 5-6 feet tall in the first spring and clumping species will usually grow to 4-5 feet tall.

Unpacking Bare Root Plants

You will be sent tracking details as soon as your plants are shipped. Unpack your plants as quickly as possible after they are delivered. We use two types of boxes, side-sealing and top-sealing. For boxes that are taped along the whole length you can cut the tape on either side and remove the plant bundles by cutting the tape holding the bundle to the bottom. For boxes that are sealed on the top and bottom, it is easiet to open the bottom of the box (the shipping label is at the top) and pull the bundle of plants out straight out. Check that the box is empty as there can be a second bundle of plants stuck towards the top.

When you are ready to plant, remove the trees from the plastic and soak the roots in a bucket of water for 30 seconds. Do not expose the roots to direct sunlight and do not allow them to dry out. When planting large quantities of plants we keep the plants in a black garbage bag to keep all sun and air flow away from the roots and pull each plant as soon as the planting hole is ready. Water the soil well right after planting.

What if I am not able to plant right away?

You can usually leave the plants in their shipping container unopened for 1-2 days if there were no shipping delays and you have received your plants from late November through February. Plants shipped when it is warmer can't stay in their packages for as long.

For longer term storage of plants you can pot them up or plant them in rows close together temporarily and then pull them out later in the spring to be planted again. This keeps the roots moist while allowing for air flow to the tops. The roots should have good contact with the soil to ensure they have access to adequate moisture.