Opus Horticultural

Opus Horticultural Horticulture - Resource Management
Integrated Pest Management
Water and Gardening

Root Suckers Below the Graft On Pear. The bane of happy fruit trees, Root Suckering. Dig down and find the point of atta...
01/22/2026

Root Suckers Below the Graft On Pear. The bane of happy fruit trees, Root Suckering. Dig down and find the point of attachment to the root and cut it clean against the root with sharp pruners. Then clean with 70% alcohol. Above the red line is the graft union. The red arrow points directly at the graft line where rootstock and varietal are joined. Any shoots that grow below the graft must be removed. The rootstock is always more aggressive and if allowed will take over the varietal.

Nice catch on the morning walk. Recurrent bloom on a Wisteria. This happens on American Wisteria, not the Asian species....
09/17/2025

Nice catch on the morning walk. Recurrent bloom on a Wisteria. This happens on American Wisteria, not the Asian species. Known as Wisteria frutescens, American Wisteria, Swamp Wisteria, Mississippi Wisteria, and Atlantic Wisteria. Go forth and plant watch.

Rose of Sharon or Hibiscus syriacus.. a worthy planting
08/30/2025

Rose of Sharon or Hibiscus syriacus.. a worthy planting

Citrus Time
08/28/2025

Citrus Time

Learn how to protect your California orange, lemon, mandarin, lime and other citrus trees from the Asian citrus psyllid pest and the plant disease it can spread, Huanglongbing, also known as citrus greening disease.

Just going to leave this right here, it can be done, the timing has to be impeccable
08/15/2025

Just going to leave this right here, it can be done, the timing has to be impeccable

From our friends at Master Gardener
08/14/2025

From our friends at Master Gardener

California has a variety of native plants that produce berries in late summer. Here are some notable ones:

California Coffeeberry (Frangula californica): This shrub produces small, dark berries that ripen from green to red to black in late summer. The berries are a food source for birds and other wildlife.

Elderberry (Sambucus nigra ssp. caerulea): The blue elderberry is common in many parts of California. It produces bluish-black berries in late summer, which are edible when cooked and are often used in jams, syrups, and wines.

Western Snowberry (Symphoricarpos occidentalis): This shrub produces white to pinkish berries in late summer, which are eaten by birds and other wildlife.

Ribes sanguineum (Red-Flowering Currant)
This deciduous shrub is native to the western United States and is known for its clusters of pink to red flowers in the spring. By late summer, it produces small, dark blue to black berries that are edible but often considered more suitable for wildlife than for humans. The berries attract birds, especially in late summer and early fall.

These plants not only provide food for wildlife but also add color and interest to the garden in the late summer months. If you’re planning to grow any of these, make sure to consider the specific growing conditions they require.

08/13/2025

From rootstock selection to harvest timing, vineyard decisions shape fermentation—and every pour in the glass.

In UC Davis Continuing and Professional Education’s new online Viticulture Certificate Program, instructor George Zhuang teaches Vineyard Management and shows winemakers and viticulturists how grape growing and winemaking are part of one continuous process.

📖 Read more: https://bit.ly/3JcbIH8

Art Skill and Science The proper way to transplant a large tree.
08/11/2025

Art Skill and Science The proper way to transplant a large tree.

08/11/2025
For my local friends and clients.
08/09/2025

For my local friends and clients.

This popular fruit tree pruning workshop is back! Sunday, August 24th from 9:30am-12:00pm we'll be at the Cavanagh Center Food Forest with guest presenter, Clare Riesman, local arborist and farm and garden educator.🌳

Join us to get hands-on experience to learn how to best prune your fruit trees in the summertime!☀️

Last time we held this workshop it filled up quickly, so sign up here: https://dailyacts.org/event-cal/fruit-tree-pruning-at-cavanagh-center-food-forest/

08/08/2025
08/08/2025

Learn how to protect your California orange, lemon, mandarin, lime and other citrus trees from the Asian citrus psyllid pest and the plant disease it can spread, Huanglongbing, also known as citrus greening disease.

Address

Sonoma, CA
95476

Website

Alerts

Be the first to know and let us send you an email when Opus Horticultural posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Share