Flowers become fruits through a process that starts with pollen landing on the right spot. Once your flower gets pollinated, it triggers a chain of events inside the bloom. The petals fall away over a few days. The base of your flower swells up. What was once a pretty bloom slowly turns into the fruit you pick at harvest time.
When I first grew tomatoes in my backyard garden, I watched this happen up close. Small yellow flowers opened on my vines each morning. Within a few days of opening, the petals would dry up and fall off the plant. Behind them sat a tiny green bump that grew larger each day. That bump turned into a full-sized green tomato in about 3 weeks after the flower first opened.
Here is how pollination and fruit development works inside your flowers. Pollen grains land on the sticky tip called the stigma at the top of the bloom. Each grain grows a tiny tube down through the stem toward the ovary at the base. When the tube reaches an ovule inside, it delivers genetic material that joins with the egg cell waiting there.
This joining process is called fertilization and it sets off big changes in your flower. The fertilized ovule starts growing into a seed inside the bloom. The ovary wall around it begins to swell and change its texture. In a tomato, this wall becomes the juicy red flesh you eat. In an apple, it becomes the crisp white fruit around the core.
Different plants in your garden need different types of pollination to make this happen. Your tomatoes can pollinate themselves since each flower holds both male and female parts. A gentle shake or breeze moves pollen onto the stigma within the same bloom. Apples need a different approach. They require pollen from a different variety of apple tree to set fruit on your branches.
The flower to fruit transformation can fail if conditions go wrong during the critical window. High heat above 85°F (29°C) can kill pollen before it works. Cold snaps below 55°F (13°C) can stop pollen tubes from growing. Heavy rain can wash pollen away before it reaches your stigma. These problems cause your flowers to drop without making any fruit.
You can boost your success rate with a few simple steps in your garden space. Plant flowers like marigolds and zinnias near your vegetables to attract more bees. These pollinators visit your crops while they gather nectar from companion blooms nearby. More bee visits mean more thorough pollination and bigger harvests at the end of your growing season.
For your indoor plants or during poor weather, try hand pollinating flowers yourself. Use a small brush or cotton swab to collect pollen from the male parts of the flower. Dab it onto the stigma in the center of the same flower or a different one nearby. Do this in the morning when your flowers are fresh and pollen is ready to go.
In my experience, keeping your plants well watered during flowering makes a big difference. Stress can cause blooms to abort before they set fruit. Avoid high-nitrogen fertilizer at this stage since it promotes leaves over fruits. Watch the weather and protect your plants from extreme heat or cold during their bloom window. These simple steps help more of your flowers make the full trip to ripe fruits.
Read the full article: 6 Plant Growth Stages Explained Simply
