Hello! My character is a florist in a medieval kinda era in Europe, and lives in a climate that is very humid, though not hot. Greenery flourishes during spring and summer, but during winter, near nothing grows. I'm sorry if this is a really broad question, but could you help me out with a wide variety of flowers and/or herbs that may grow there, and how she might have to deal with the state of the plants in winter? :< Thank you so much for the work you guys do!
From what you’re saying it sounds like your characters are living in a humid continental climate. Now I don’t know if that’s what you had in mind, or if your Europe and this Europe are alike enough to fall on the same scale, but for the sake of this ask that’s what I’m going to go with. Because if your climate isn’t among Köppen’s classifications you broke reality and then I cannot help you because real life plants don’t exist outside of this.You’re lucky though. Germany falls into that climate zone and in fact, I live in a very rainy city, so whatever may grow here will likely also grow in your character’s yard. Let’s talk a little more about climate though before we get to that. When it comes to humidity we’re talking rain and a lot of it, and too much rain can kill a plant just like drinking extremely excessive amounts of water can kill a human. So your character will have likely build sheds or extended their roof or made a canopy of some sort if it keeps raining for days.
When a plant is overwatered they absorb water faster than they can use it which causes their roots to be waterlogged. Plants need to absorb nutrients, water and air through their roots. If the soil doesn’t drain well enough, it will hold the excess water from the heavy rain and the roots won’t be able to get air, effectively drowning them to death. Which in return keeps the plant from taking up nutrients and oxygen and die in the process. Leaves will appear wilted and yellow and buds fail to open. Edemas form, cells that burst from too much water and form blisterlike areas on the underside of the leaves, if rot doesn’t kill the plant first as it’s now more susceptible to diseases, fungi and pests.
Overwatering is a curable condition, however, that’s not easy and it’s generally more difficult than recovering from having too little water. Other than that a lot of plants will rot when you dump a bucket of water on them, simply because their foliage is so thick and full only a really harsh sunny day might be able to thoroughly dry it. It’s what plants do – they rot when you soak them in water. (Unless they’re underwater plants.) A side effect of a surplus of roof will be that your character can keep plants outside in the spring/summer that don’t necessarily like rain in the first place and might not even grow in their area in the first place.
Winter. Winter is tricky. Your character will likely grow their flowers in a field, which is good and solves most of the problems that arise in winter. Generally, a plant needs about three to four weeks to properly take root, which is essential for a plant to become hardy. Now your character likely won’t buy potted plants much I imagine so it won’t be that big of a deal, but it’s still something for her to keep in mind if she wants to add one to her garden. Now when it’s cold and freezing outside and the plants have been trimmed to size it’s time for your character to find a forest, because what she’ll need is fir and pine and conifer and lots of it. All of these, especially fir is used to cover the remnants of her plants with. It’s not particularly necessary in a garden, but it keeps the plants snug and warm and basically, there is no downside to this other than that it takes up time. All potted plants, however, do need a cover of fir, they will also need something (in the 21st century we use bubble wrap, she might just use more fir and a rope or has something entirely else figured out) to wrap the pots in. She might also consider taking the pots inside just to be sure.
At last, all the plants need is water. Not much though, a little once a week should be fine, but there’s a catch. See, it’s winter, the ground freezes occasionally preventing watering. So she can do everything right, but frost can still kill her hard work because she can’t water her plants and they die from dehydration or just freeze to death.
This isn’t a must, but it would be handy for her to have her garden separated into clear sections so she can uproot and dispose of the plants which aren’t hardy more easily in time, so replacing them becomes easier. It would give her some form of control over what grows when and where.
Before we get to the list, let’s talk about her business in winter. There might not be a lot around, frankly, maybe all she has is conifers, pine and fir. Even if it’s just that, she can still make arrangements. Let her make wreaths and garlands and decorate them with ribbons, jewellery (light in weight preferably), dried fruits and nuts and whatever else she has at her disposal to add a little colour. Any plant she might have put aside during summer & autumn to dry can now come to use. She can even make floral arrangements with moss (which was the predecessor of floral foam) or clay. Moss was used because of its exceptional capability to soak up and store water which then would supply the cut flowers, clay is preferable for things that dry. I did, in fact, make Christmas arrangements with clay before, they didn’t contain flowers, just conifers and that worked just fine. When using moss (the regular kind you’ll find in any forest) she will have to make sure it tightly secured into place before starting on her arrangement. Another agreed upon alternative for floral foam is Iceland moss, which looks a bit like a sponge and has this cool effect that it’s really soft and squishy when wet but gets hard and firm when dry, which makes it perfect for arrangements meant to dry. (Or someone who has trouble figuring out if their arrangement needs water… could be something some of her customers appreciate.)
It’s hard to say which plants exactly grew in medieval Europe, so this is more of a mix of “I’m selling this and I know it could grow in my garden if I had one” and “this grows somewhere outside where I live.”
Trees: Oak, willow, birch, chestnut, acorn, fir, pine, conifer, catkin *)
Shrubs: Lavender, carnations, hydrangea, rhododendron, campanula, roses, peonies, ornithogalum (accurately nicknamed gardener’s spook because it’s nearly impossible to get rid off), helleborus
Flowers: Marguerites, chrysanthemums, dahlias, geraniums, petunias, jasmine nightshade
Bulbs: Allium, tulips, hyacinths, daffodils
Herbs: Rosemary, thyme, basil, mint, oregano, chives
Greenery: Ivy, muehlenbeckia, moss, Iceland moss, buxus, panicum
*) Florists work with twigs and tree bark. The former we use to make a sort of frame for bouquets, for example, the latter to hide floral foam most of the time.
http://homeguides.sfgate.com/signs-overwatering-plant-49515.html
https://en.wikipedia.org/wiki/Humid_continental_climate