Write an article based on this "Check your species' hardiness zone. Know the safest times to plant. Choose a place in your yard that gets a mixture of sun and shade. Allow enough space for it to grow substantially. Prepare rich, porous soil. Loosen the roots. Plant the hydrangeas in a spacious hole carefully. Fill the hole halfway with soil, a little at a time. Water the hole, let drain, then fill the rest of the hole with soil. Water the plant frequently for the first few days. Reduce the watering but keep the soil damp."
One of the most popular hydrangea species, Hydrangea macrophylla, does best in hardiness zones 69, with minimum winter temperatures of -10 to +25F (-23 to -7C). A few species can tolerate zone 4 conditions (-30F/-34C), including H. arborescens and H. paniculata. Hydrangeas may suffer when planted in hot temperatures or frost. Container-grown hydrangeas are best planted in the garden during spring or fall. Bare root hydrangeas without soil should be planted in early to mid-spring so they have time to adapt to their new location. Ideally, the hydrangea should get several hours of sun each day, but be protected from the hottest afternoon sun by a wall or other barrier. If this is not possible in your yard, select a location with bright partial shade throughout the day. Hydrangeas can grow to become 4' by 4' bushes (1.2m x 1.2m). Research your species and variety online if you want a more accurate idea of how large your hydrangeas will grow. Mix compost into your soil if it is low in nutrients. If your soil is dense or mostly clay, mix in pine bark or other mulch material in order to prevent water from forming pools around the plant. Roots can become tangled or clustered together, which makes it harder for them to grow out into the soil once they're planted. This can limit the amount of nutrients the plant absorbs. To loosen your roots, cut a few of the outside roots, then gently shake the roots apart. Once the inner roots are free, they will be able to spread out into the soil. Dig a hole about as deep as the root ball or potting container, and two or three times as wide. Carefully lift the hydrangea and place it in the hole. Be careful not to scrape or break the roots while moving the plant. Press the soil gently together as you fill the hole to remove air pockets and provide support to hold up the plant. Stop when the hold is approximately halfway filled. Water the half-filled hole thoroughly, then leave it to drain for at least 15 minutes or until there is no standing water. Fill in the rest of the hole in the same way you were filling it before, pressing down small portions of soil at a time. Stop when the roots are covered. Do not bury any more than 1 inch (2.5 cm) of the trunk or stem. Newly transplanted plants may not yet have roots functioning at full capacity, so it's important to water them well. Water once more when you're finished filling the hole, then water daily for the first few days after planting. Once the hydrangea is established in its new location, water whenever the soil is about to dry out. Make sure that you give it a deep watering each time, not just a sprinkling of water. The soil should be kept somewhat moist, but not soggy. Hydrangeas do not usually require additional care, and often grow or bloom without difficulty. If your hydrangeas wilt or dry out, construct a shade to block the sun during the afternoon. You can also try using mulch. If the winter forecast predicts unusually cold or prolonged frost, or if you are planting in a lower than recommended hardiness zone (see above), you may need to provide winter protection for your hydrangeas.