This article describes how to determine vineyard nutrient needs through grapevine tissue and soil sampling. It also provides tissue testing guidelines.
To keep your lilacs looking their best, they need to be pruned, fertilized and shaped almost every year, soon after they are done blooming in the late spring.
Giving tomato plants a boost can make a difference in the amount of fruit the plant produces, according to Master Gardeners trained by the Oregon State University Extension Service.