How often to water camellias in California

In July, established camellias in loam need a deep watering about every 8 days in the Central Valley, about every 11 days on the south coast and about every 9 days in the South Inland zone. Sandy soil holds less water, so waterings come closer together. Clay stretches them. Check the soil before each watering and skip one after a soaking rain.

In July in the Central Valley, established camellias need about 1.1 gallons a day for a plant 4 feet across and about 4.3 gallons a day for a plant 8 feet across. Give it in deep waterings spread days apart rather than a little every day, so the whole root zone gets wet.

Yes. WUCOLS rates camellias separately for each of the six California climate zones: moderate water in the North-Central Coastal zone, moderate water in the Central Valley zone, moderate water in the South Coastal zone, moderate water in the South Inland zone, not suited to this region in the High and Intermediate Desert zone, moderate water in the Low Desert zone. The monthly table above shows how the same rating translates into different gallon amounts as reference evapotranspiration changes.

Bud drop is the classic camellia complaint, and water is usually behind it. Drought stress in late summer and fall, while buds are forming, or big swings between wet and dry soil will make buds brown and fall. Keep moisture steady from midsummer on. A plant that sheds a few of many buds is just thinning itself, which is normal.

Yes, easily. The shallow roots suffocate in constantly wet soil, and root rot follows: leaves yellow and wilt, and watering more only makes it worse. If a camellia looks limp but the soil is damp, stop watering and check drainage. In heavy clay, replanting slightly high on a mound often solves it.

Keep the original root ball evenly moist through the first summer, not just the surrounding bed. Nursery root balls can dry out even when the soil around them feels damp, so push a finger into the root ball itself before deciding. Water slowly at the base and mulch right away to slow evaporation.

Yes, with one adjustment: camellia roots spread wide and shallow, so a single emitter at the trunk is not enough on an older plant. Use several emitters or a ring of inline drip tubing out near the edge of the canopy. Run it slow and long so the whole root zone wets through, then let the surface dry before the next cycle.

In most of the state, winter rain covers a camellia in the ground. The exception is a long dry spell or a stretch of dry offshore wind, which can hit right in the middle of bloom season and shrivel buds and flowers. Give a deep soak if the top of the soil dries out during one of those stretches, and check containers more often since pots dry faster.

Look at the pattern. Yellow leaves with green veins mean chlorosis from alkaline soil or water, which acidifying fertilizer and an acidic mulch help correct. Overall yellowing with wet soil points to overwatering or poor drainage. A few yellow leaves dropping from the inside of an otherwise healthy plant are just old foliage being shed, and bronzed, scorched patches mean too much sun rather than a watering problem.