If properly looked after rhododendrons thrive in many areas of Northern California. The shallow rooted crops need lots of moisture to develop and flower. A layer on the soil helps and safeguards the roots of the shrub keep the moisture in the soil, while also providing a finished look to the garden. Mulch stops weed growth, which is important because rhododendrons do not tolerate competition from weeds for nutrients and moisture.
Spread 2″ of leaf mulch on the whole root zone of the rhododendron. The root zone stretches out to the ideas of the outer most branches on the shrub. Protect the whole soil area in the mattress with all the leaf mulch in the event the rhododendron is in a mattress. Place mulch when the soil starts to warm up in mid- to late- .
Pull the mulch from the trunk of the rhododendron therefore there’s a 2 inch gap between the trunk as well as the mulch. The dampness in it could lead to rot in the event the mulch touches the trunk of the shrub.
Replenish the mulch in early fall or late summer. In locations and moderate areas, A2- to 3 inch winter mulch layer is enough. In locations and higher elevations where winter frost is typical, use a 5 inch layer of mulch to insulate the roots of the rhododendron.
Remove the mulch each spring if it has not decomposed entirely. Replace using a layer of mulch. Mulch that is old might harbor pests and disease- .