Need advice please

Thanks all!! The room thing can work in theory but since the house is on a foundation when I tried to make a room out of the garden, the plants would disappear. So putting them in the inventory works though! Thank you all for your suggestions and advice. I have dabbled with gardens in the Sims 4 in the past but this is the first time I have really played it out. I have a sim in the Flower Arrangement career and has almost every flower, herb, veggie, and fruit in her garden. She's at a 10 gardening skill. It's so much fun and had no idea how lucrative it can be!

One question while I'm here I have one more question. She spliced and grafted to make the birds of paradise but that plant never seems to harvest birds of paradise...just the two flowers I spliced together (forgot what they are at the moment) Is there usually a long wait?