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Garden Q & A – Page 7

Correcting Erosion on a Steep Bank in Encino

Question from Denise: Our hillside, steep and large area was covered in ivy and was just fine and holding. We are not sure what happened, but due to either improper draining of the pool, a broken pipe, or years of slow erosion, the last years caused the lower part of the hillside to totally erode, […]

Humic Acid

Question: I live in San Diego. I read your books and I am looking for a supplier for humic acid and for EnviroTree. Where do you get these products? Answer: Humic acid is contained in the product “John and Bob’s Soil Optimizer” which is very effective but also expensive. A less expensive source of humic […]

Southern California Planting Zones

Question from Kim: What is the zone for planting/growing vegetables, flowers, trees in the high desert of so. Calif. I live in the Antelope Valley, north of Los Angeles. My zip code is 93551. Where can i look this up on the web? Answer from Pat: You live in Sunset Zone 11. You will find […]

Is it a Desert Rose?

Q. Can you provide me any information on desert rose (Euphorbia tactea)? A. There is no such plant as Euphorbia tactea and desert rose is the common name of Adenium obesum. We both learned something and actually the plant in the photo you sent me is not an ordinary E. lactea. What it looks like […]

Erosion Control for Steep Hillside: Last Minute Installation to Hold the Soil

Question from Melissa: Hi Pat, My elderly parents live in Rolling Hills Estates on the Palos Verdes Peninsula and have a very steep hillside leading down from their backyard. About 1 year ago a “live” sprinkler pipe ruptured and sent a landslide down into the neighbors pool below! After huge expense and going through tge […]

Cutting back a Passion Vine (passiflora)

Q. How/when would you suggest I cut back the woody vines in a passiflora (passion vine)? I planted four five years ago, and the top surface is green, but inches under that is nothing but wood. They protrude from the wall more and more with new growth. A. Passion vines (Passiflora) are largely tropical climbers […]

Shrimp Shell Meal

Question from George: I’m having problems finding the shrimp shell meal you talked about at the fairgrounds the other day, the only place I can find it is on line and its a 50lb bag. If I bought the 50lb bag how long can I store it and it still be good. It would take […]

Small Patio Trees

Question from Margo: I am having two trees removed and need replacements. One, will be in an elevated triangular planter about 6″ at the widest point. It is directly over a spa. So I need a tree that will not drop leaves and will not have invasive roots. The second was in the ground and […]

Seeds for Lobelia richardsonii

Q. I’m interested in obtaining seeds for L. richardsonii.  Any idea where they can be found?  A local garden center used to sell it in containers and it would trial 30″ or more… Have never seen it since. A. Lobelia richardsonii is a plant of uncertain origin. It might be a mutation or hybrid of […]

Climate Zones

Question from Debbie: I recently moved to Temecula and want to know what gardening zone I am in? Answer from Pat: Most of Temecula is in Sunset Zone 18, but if you live on an air-drained hillside you might be in a tiny microclimate that is more like Zone 19. Bougainvillea can be grown in […]