Having your own garden is not that complicated today, it's actually become quite easy thanks to the great availability of important supplies, tools and materials. It's no longer the case that you have to spend a lot of time searching around for quality fertilizer, or planning in advance what you're going to offer because you only get limited deliveries from one single reseller in your area - you most likely have a good provider that operates close to you which offers everything that you'll ever need in your garden.
Big gardening stores are the best option available to you when you need help with your efforts, as you will find everything you need under one roof, avoiding the huge waste of time that is going from one store to the other. Not only that, but you'll also get the expert help of many employees who've been specifically hired for their experience with growing different types of plants. So even if you don't know exactly what you need to buy, you'll be able to just describe your issues to someone at the store, and soon enough you'll have the answer to your problems in your hands.
If you live in a larger area, it may be the case that you actually have several different stores to pick from. In this case, just research them online and find out which of them are known for providing a quality service. It should be easy to check which of the gardening centers in your area are known for having quality products and service, and which ones are to be avoided. And of course, it may very well turn out that there are several viable options. Pay them all a visit in this case, and make your decision based on additional factors such as how long it takes you to get to each of the stores.
If you're growing more special plants that have unusual requirements, you should definitely start your shopping with a consultation unless you're absolutely sure you know what you need to buy. You can easily ruin a plant by buying the wrong things for it, and the staff at those stores is there for a reason. Don't waste your money on products that will ultimately spell your plants' doom, make sure you're always informed when shopping for any plant that you've never grown before and aren't completely familiar with.
And on that note, don't be afraid to try out something new if you've been bored with your garden lately! When you're at the gardening centre next time, ask if they have any plants or seeds that would go well with your current garden, but don't overshoot this. Make sure the new plants you're buying aren't too complicated to grow, and be prepared to make some more investments into the right kinds of supplies that you need to grow them. But in the end, there's something uniquely rewarding about gardening once you've successfully brought a plant to life and then to full maturity through your care and attention.