Sanhedrin Nursery – Garden Blog

• Mother’s Day is the perfect time to give a gift of a living plant. Roses, lilacs, hanging fuchsias and ivy geraniums are sure to please her.

• It’s time to put out oriole feeders. You can also attract them with fresh orange halves.

• Feed roses to encourage a beautiful display of color later this month. Treat plants to prevent insect and disease problems.

• Plant the vegetable garden this month, but remember that late frosts can still nip tender young plants.

• Plant an herb garden in a container near the kitchen door for convenient fresh spices like basil, oregano, parsley and thyme.

Lovely Japanese Maples

Japanese maples are beautiful in every season, from the new growth emerging in spring, to the wonderful leaf textures through the summer, to the bright fall colors and finally the artistic arrangement of their bare branches in winter.

While most small trees are grown for their fleeting flowers, Japanese maples are grown for the beauty of their leaves that come in a great variety of shapes and colors. For hundreds of years, the feudal lords of Japan bred and selected trees to find ever more beautiful specimens. Today there are hundreds of cultivars of both Japanese and Western origin.

The leaves of the most familiar cultivars look like stars because they are divided into five to seven sharply pointed lobes. Their botanical name, Acer palmatum, reflects this: palmatum, means shaped like the palm of the hand. On some trees, the lobes are further divided giving the leaves a lovely feathery or lacy appearance. These are dissectum varieties, meaning they have lacy leaves.

Leaf colors range from yellow-green to dark green, and from bright red to deep blood red. There are also trees with variegated leaves that are green outlined with white or gold. Red-leaved trees are the most prized. In an otherwise green landscape, a red Japanese maple makes a stunning accent.

Japanese maples are divided into groups based on the shape of their leaves. But generally speaking, they grow either as trees or shrubs.

‘Bloodgood’ is a vigorous lawn tree with deep, dark red leaves that hold their color well. It grows to 15 feet tall and wide, turns bright red in the fall, and is a dependable, sturdy tree.

‘Sango kaku’ is a popular tree for its bright coral red bark in the winter, pale yellow-green leaves in spring and apricot and gold fall color. It can grow to 20 feet in the landscape or be kept at 8 feet in a container.

Many of the smaller mounding types have finely dissected leaves. Typically they grow to 6-8 feet in the landscape, or 4-6 feet in a container. ‘Garnet’ is a beautiful, cascading, mound-shaped specimen with a rich red-orange color that develops best with some sun. ‘Inaba shidare’ is an upright grower, yet it has a beautiful cascading form. The deep purple-red leaves retain their color better than others in the hot summer months. Fall color is a brilliant crimson red.

‘Tamukeyama’ has a lovely weeping habit and deep purplish-red leaves that hold their color all summer. It does well in hot situations. ‘Viridis’ has green, finely dissected leaves that will burn in hot sun. The golden fall leaves are touched with crimson.

Japanese maples thrive in moist but well-drained, slightly acid soil in sun or part shade. The red-leaved cultivars need ample sunlight to develop their best color. Shade from afternoon sun and protection from drying winds will keep the leaves looking their best. Occasional watering, once a week in dry periods, and a light fertilizing in the spring will keep them healthy and beautiful.

Good under oaks, as background for ferns and azaleas, or as a small tree for patios and entryways, Japanese maples are beautiful landscape trees.

• It is time to mulch your fruit trees and flower beds to retain moisture in the soil. Xerimulch will do an excellent job at a reasonable price.

• When you plant your tomatoes, put a handful of bone meal in the bottom of the hole to help prevent blossom end rot on the fruit later on.

• “Topsy Turvy”®Tomato and Pepper Planters are a fun and convenient way to enjoy these popular vegetables hanging right outside your kitchen door.

• Hang up Codling moth traps now to reduce the number of wormy apples in your harvest this year. Replace pheromone lures in old traps.

• Gladiolus make wonderful cut flowers throughout the summer. Plant some every two weeks for continuous blooms.

Soil Preparation for the Vegetable Garden

Soil is truly the foundation of the garden. Without good soil, plants become stunted and stressed and prone to insect attacks. But good soil, loose and humusy, with good fertility, allows the roots of plants to penetrate easily and take up the nutrients they need throughout the growing season.

First determine what type of soil you have. Soil texture is determined by particle size, which ranges from microscopic clay flakes to more rounded silt particles to sand grains. While undisturbed sandy soils are well aerated and well drained, they are nutrient poor, since sand and silt cannot hold nutrients. In contrast, clay soils hold nutrients very well but have poor drainage and aeration. Thus a soil with both sandy and clay characteristics should be optimal for plant root health.

However, unless a huge amount of sand is added to clay soil, it will not improve the soil texture. The pore spaces in a clay soil are very small and when sand is added, the large pore spaces of the sand are filled with the smaller clay particles. The result is a heavier, denser soil with less pore space than either the sand or the clay soil alone.

It is important not to turn clay soil when it is still wet. It will form large clumps that dry hard and solid and do not allow roots to penetrate. It may take a week of sunshine before wet soil is ready to turn. When it has dried out sufficiently to break apart when you turn a spade of soil, it is ready to be worked.

Using organic matter is the best way to improve soil. Compost, manures, leaf mold, sawdust, and organic amendments increase the water-holding capacity, aeration, and drainage of both sandy and clay soils. These materials are decomposed by soil organisms releasing nutrients that become available to the plants.

To add organic matter to a new bed, first turn the soil to a depth of 8 to 10 inches then spread a 2-inch layer of decomposed material over the soil and turn it in. If you use fresh manure or sawdust, it will take nitrogen from the soil for its own decomposition.

If you want to “double-dig” the bed, do that next. This method, taken from the “French intensive” gardening method, will yield the most produce in the least area. Then add organic nutrients in small amounts to enrich the top layer of soil. (see “How to Grow More Vegetables” by John Jeavons)

If your soil has been worked before and is pretty good, only add a one-inch layer of compost to replace the nutrients you took away in the form of vegetables the preceding year. Too much compost can encourage an increase in symphylans, microscopic creatures which eat plant roots, and result in considerable crop damage.

Soil in good tilth is well aerated, retains moisture and is rich in humus. Good soil is the beginning of great things in the garden.

• Bleeding hearts are charming perennials for the shade garden. Look for them now for a special accent.

• Prepare for planting season! Turn in cover crops and do a soil test if your garden had trouble last year.

• Plant lawns now from seed. Reseed established lawns to fill in bare patches.

• Azaleas, rhododendrons and camellias provide lots of beautiful flowers for the shady spring garden. Choose them now.

• Begin spraying roses now for insect and disease problems. Neem oil is a good product for a less toxic solution.

California’s Wild Lilacs

California Lilacs, or Ceanothus, are some of our most fragrant and colorful native shrubs. Evergreen and very drought tolerant, they provide us with ground covers, shrubs and small trees for various landscape situations. About 40 species are native to California, with many selected varieties also developed.

Many wild lilacs prefer coastal slopes but some are well-adapted to inland conditions. They all like well-drained soil, and prefer light watering and little or no fertilizing. Plants often work best in perimeter areas, on slopes and as background masses.

Ceanothus are fast-growing plants. This makes them useful for quick effects and covering large areas.

They begin blooming at an early age and cover themselves with beautiful, fragrant blossoms in the springtime. Flower colors include white, pale blue, deep blue and purple. Many small flowers are arranged like small lilac blooms at the end of the branches.

Ground cover Ceanothus do best in coastal areas, but some varieties will grow in inland conditions. ‘Yankee Point’ is a wide-spreading, low, dense shrub with shiny, dark green leaves and one-inch clusters of medium blue flowers. It is drought and heat tolerant.

Wild lilac shrubs grow anywhere from 3 feet to 16 feet tall. Most types are wider than they are tall. Many varieties grow well inland including ‘Dark Star’, ‘Julia Phelps’ and ‘Concha’ with deep blue flowers, ‘Frosty Blue’, with light blue blossoms, and ‘Joyce Coulter’, with large clusters of medium blue flowers. ‘Snowball’, with white flowers, also does well here.

‘Ray Hartman’ grows as a large shrub or small tree with large, glossy leaves and profuse displays of medium blue flowers. Sometimes they are grown as patio trees making a very showy display in spring.

Ceanothus grow best with little attention or care. Three things that they dislike are soil amendments, summer water and drip irrigation. Just water occasionally with a hose until the plants are established, then leave them to grow on their own. They will live a long and healthy life this way.

Deer-resistance is often an issue with Ceanothus. Most varieties are eaten by deer since, being natives, they have long been part of their food supply. Some small-leaved or prickly-leaved varieties, like ‘Dark Star’, ‘Julia Phelps’ and ‘Blue Jeans’, are usually more deer-resistant. But given protection when the plants are young, they are vigorous enough that they can withstand some browsing once they get large.

Wild lilacs are a nice addition to the natural landscape and they will delight you each spring with their wonderful, fragrant sprays of flowers.