Sacramento Digs Gardening: Prune hydrangeas now for abundant spring blooms

This lacecap hydrangea variety goes from lavender/white to green and red in fall. (Photos: Debbie Arrington)

Key to consistent flowering? Well-timed cuts

Why don’t hydrangeas bloom?

The answer almost always comes down to pruning, either at the wrong time or too much or not in a long time. For great masses of blooms next spring and summer, prune now.

Hydrangeas can be pruned while they still have their foliage or after they shed their leaves. Don’t wait past November; the bushes need a little time to recover before spring.

Most hydrangea varieties bloom on second-year wood. Those are stems that grew the season before. In late summer and fall, the stems form pointy buds at their nodes, found at the base of leaves. Those buds are next year’s mopheads and lacecaps.

Stems that bloomed this spring will bloom again. Keep those stems, cutting down by a third. Make the cut 1/2 inch above buds.

Hydrangea buds are visible at the base of the leaves.

Leave alone soft stems with lush green growth. They’re still developing.

After that, pruning is a matter of balance and air flow. Remove woody stems that have lost their vitality (they feel brittle and light) or that crowd the center of the bush. Avoid overpruning; the bush should be about one-third smaller than it began – not down to the ground.

At a minimum, deadhead hydrangeas, removing spent bloom heads. That retains the second-year wood and prompts bud development.

Cut now, hydrangea flower heads can be dried and used in wreaths of other decorations. Many varieties turn interesting shades of red or green, a perfect holiday combination.

GENERAL GARDENING

An article about gardening.

Keywords:

gardening Sacramento pruning hydrangea shrubs fall gardening blooms flowers

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Garden Checklist for week of May 5

Survey your garden after the May 4 rainstorm. Heavy rain and gusty winds can break the neck of large flowers such as roses. Also:

* Keep an eye on new transplants or seedlings; they could take a pounding from the rain.

* Watch out for powdery mildew. Warmth following moist conditions can cause this fungal disease to “bloom,” too. If you see a leaf that looks like it’s dusted with powdered sugar, snip it off.

* After the storm, start setting out tomato transplants, but wait on the peppers and eggplants (they want warmer nights). Pinch off any flowers on new transplants to make them concentrate on establishing roots instead of setting premature fruit.

* Trim dead flowers but not leaves from spring-flowering bulbs such as daffodils and tulips. Those leaves gather energy to create next year's flowers. Also, give the bulbs a fertilizer boost after bloom.

* Pinch chrysanthemums back to 12 inches for fall flowers. Cut old stems to the ground.

* Mulch around plants to conserve moisture and control weeds.

* From seed, plant beans, beets, cantaloupes, carrots, corn, cucumbers, melons, pumpkins, radishes and squash.

* Plant onion sets.

* In the flower garden, plant seeds for asters, cosmos, celosia, marigolds, salvia, sunflowers and zinnias. Transplant petunias, zinnias, geraniums and other summer bloomers.

* Plant perennials and dahlia tubers for summer bloom.

* Don’t wait; plant summer bulbs, such as gladiolus and tuberous begonias.

* Harvest cabbage, lettuce, peas and green onions.

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