MG is an excellent fert. But, IMHO, its best use isn't as a general fert for planting beds.

It's better use is to keep potted annuals growing at a steady rate, and/or for a fast pick-me-up for ground plantings that need a boost.

I've heard something about the chlorine content being a problem, but have not looked into it. You should sample your soil and have it analyzed before fertilizing anyway. Soils vary in nutrient availability, both from one spot to the next and with the seasons.

Miracle Gro is not suited for long term use in the garden. It is great for annuals in a container, even for vigorous bedding plants for a few months in summer, but don't keep spraying it on the same place all the time.

Although there is the potential for fertiliser burn with Miracle Gro, it is mostly quite soluble and will rapidly wash away into the nearest watercourse :( The high levels of Phosphorus are likely to build up in soil after a while, leading to toxicity or deficiencies of other nutrients.

For widespread fertilising of garden beds, use an appropriate outdoor fertiliser at the recommended rate. Many plants will need no fertiliser. Ideally only use the fertiliser that supplies nutrients lacking in your particular soil. If you amend your soil properly then you won't need extra fertiliser except for the most greedy of plants.

Thanks for the advice. I tend to use cedar chips in my planting areas for a number or reasons which makes applying a soluble fertilizer much easier, but I will try to find another way. I do amend the beds with organic material from time to time, but unfortunately I need more time to do it correctly.

Well, there is always compost tea or liquid seaweed or fish emulsion.

I would imagine there would be directions, but how much should be applied if I found some of this liquid seaweed or fish emulsion. I don't ever recall using this before. I've heard it's not the best thing to impress your neighbors.