Oftentimes this kind of theme can end up seeing a little bit predictable or even old-fashioned. It may become stuffy or even cheesy. This is why it's really important to change up your color palette. For instance you could go with a chocolate brown and blue palette that will be very gender neutral but then just bring in softer touches. Right now bird motifs are extremely popular. You may even be able to find a few vintage bird statues that you could use as inexpensive decorative accessories.
Of course there are always wall stickers. You will really want to use the oversize wall stickers and maybe just use one or two. It should really relate to the overall theme just so it doesn't end up looking too cutesy or juvenile. Then you could try going with a brown and blue geometric print on your window treatments. This will coordinate back with any wood furniture that you have in your space and be a subtle theme that still has big impact.
If you do decide to go with a floral theme in your office then you can really play around with flowers a lot. It's important to get a unique color palette going in this instance as well. If you want to have drapes in your room then maybe try finding fabric with a yellow background. This will be a very bright print that can really compliment traditional red roses. It can either be a traditional or country cottage look depending on what you want inside your space.
You can also make a garden theme work in a contemporary space. This is important because often these modern spaces just seem to feel very cold and a little bit sterile. Instead, you can just really get everything together with just one piece. This could be a throw pillow or a valance. It's also the perfect solution if you can't paint your walls or you just have pretty basic furniture. If everything in your room is white and black then try going with a white and black floral print. This will have high contrast and really make a statement and gives that very subtle and feminine touch.
I suspect few children of today would spend countless hours putting together the perfect indoor garden. To us, as 9 and 10 year old, the first step was begging an old biscuit tin lid from our mothers or grandmothers. The biscuit tin lid was ideal because it was just the right depth. Next, armed with our empty tin lids, we would make our way down to the end of the garden or, in my case, into the woods that grew around my grandparents' home. Here we would find the dank conditions ideal for the sphagnum moss to grow and plenty of leaf mold to use as compost. We would fill our tins just below the rim with the leaf mold and then gently press the sphagnum moss into place to completely cover the leaf mold in the tin lid.
The next stage was to obtain tiny stones or tiny shells - I was lucky there because we lived within a few yards of the beachfront so I had access to plenty of shells. We would then proceed to decorate our gardens - one year I was even able to get some alpine plants to grow in mine: I prized some of these little plants from the crevices of our garden wall. Making an indoor garden was often given to us as a homework task from school during our Easter holidays. Of course, it helped that we all enjoyed making them. Today, sadly, it seems rather a lost art.