Author Archive for Pat Welsh

Brown/Black Tips And Black Spots On Tabebuia Impeginosa

Gardening Question From Lynn: We are in Culver City,Ca and have three one year old Tabebuias all of which are developing black/brown tips of leaves as well as black spots. Could this be a drainage issue, and/or over watering or part of the semi deciduous process? Our arborist suggests over watering. Any tips on how […]

“Mushroom Compost” Or Substrate

Gardening Question From Martha: I have access to a commercial mushroom farm that makes its spent mushroom medium available at no charge to gardeners. This seems to be a terrific addition for my raised beds. I once toured a mushroom farm and saw that they sterilized the medium before onoculating it with the mushroom spawn. […]

Kumquat Trees With Very Cupped Leaves

Gardening Question From Andrew: I have 3 kumquat trees in my garden area.  Two are 3 years old, one is about 5 years old.  My soil is very low in N and K.  A lot of 5 year old’s leaves are somewhat yellow.  I do feed on a regular basis with organic EB Stone citrus […]

Propagating Podacarpus

Gardening Question From Bee: Could you please tell me how to start a podacarpus from a cutting?  My neighbors have really ugly wooden fences (we live in Florida) and I think a living fence would be so pretty.  I have seen them formed into beautiful hedges and that would be perfect for what I want. […]

Silver Sheen VS Podacarpus VS Purple Hop Bush

Gardening Question From Maria: Hi, I live in Irvine, CA, and I am looking for replacement for privacy hedge/trees for our two 20 foot Camphor trees. Unfortunately, the Camphors had grown too big and lifting our concrete and messing up our pipes. The trees will be right by our main patio area so I prefer […]

Salvia Greggi

Gardening Question From Leslie: Planted 5 5-gallon Salvia Greggi (red sage) in my brand new drought tolerant garden in mid November. With the winter rains the plants grew and are bearing many beautiful long sprigs of red flowers that hummingbird enjoy. When should I prune and how long should I leave the stems? Answer From […]

Kniphofia “Ember Glow”

Gardening Question From Lesley: Planted three 5-gallon Kniphofia “Ember Glow” in bloom in mid November. Six months later the plants have doubled in size but no bloom spikes. When should I expect plants to bloom again? Answer From Pat: The bloom season of most kniphofia is May and June. To me that is too short. […]

Pruning Cassia Leptophylla

Gardening Question From Suzanne: We have one of these trees in the front yard of our Huntington Beach home. It has grown rather large and unruly. Can we have it pruned now or must we wait until autumn? Answer From Pat: Cassia leptophylla should be pruned only when necessary to correct shape or control spread. […]

Grasshopper Control

Gardening Question From Kimberly: We live in New Mexico. Have developed a very bad infestation of young grasshoppers. Suggestions? Answer From Pat: Grass hoppers are ground-dwelling insects which, when conditions are just right, appear in swarms at which time they’re known as locusts. Swarms of locusts have at times changed human history and thus were […]

Evergreen Trees

Gardening Question From Mila: I live in Santa Clarita CA, 91355.  I currently have an Olive Tree in my front yard.  Last year it started bearing fruits that stained my concrete and littered my lawn.  My gardener also stated that it needs to be removed soon since it will eventually damage my concrete.  I am […]