1.   When I do fertilize the plants you mention, I use a high-phosphorus fertilizer.

2.   Bees fertilize plants as they collect nectar from flowers.

3.   Canning fertilizes his plants with a weak solution when they are blooming or just before they go dormant.

4.   Container gardeners must be careful to fertilize their plants often.

5.   Could you tell me when and with what to fertilize such plants?

6.   Should I fertilize both plants in March?

7.   You can not only water the root balls directly by pouring the water down through the stakes but you can also fertilize the plants the same way.