Cucumber Plant Stages, a Vegetable Growing Guide Donna Larson, April 17, 2024April 17, 2024 When planting cucumbers for the first time, it’s important to know how to plant and care for your cucumber plants. However, it’s equally important to know what to expect throughout the life of your plants. Let’s go over all of the cucumber plant stages, from seed to harvest, so that you’ll know how to grow the best cucumbers in your vegetable garden this year. Cucumber Plant Stages of Growth These are the six cucumber plant stages during its entire life cycle. Stage 1: Cucumber Seed Germination Stage 2: Seedlings Stage 3: the Vegetative Phase Stage 4: the Flowering Stage Stage 5: Fruit Production Stage 6: Harvesting We’ll give more details on each stage in just a bit. We first want to cover varieties and seed starting. Different Varieties of Cucumbers Before we dissect the details of the cucumber plant growth stages, let’s cover types of cucumbers that you might want to grow. The seed packet should give you the detailed information that you need to select the right varieties for your garden. First, you’ll need to know whether or not you want a bush variety or vining variety of cucumber plant. Bush varieties are great for container gardening or otherwise small spaces in the garden. Vining cucumbers will generally produce more fruits, but they need a trellis or support structure and take more space. Secondly, you need to decide if you want large cucumbers or small munchers. Straight Eight cucumbers and Marketmore cucumbers are going to look like your standard grocery store cucumbers that you’re used to seeing. They have a dark green skin, light flesh, and grow to about 8-10 inches long. Boston Pickling or Little Munchers are marketed as “pickling” cucumbers, but you can certainly enjoy them the same as their larger counterparts. Don’t forget the cucumbers that are just for fun, like the Lemon Cucumber, a/k/a The English Cucumber, which grows into a small ball-shaped, yellow fruit. It does not have a lemon flavor but it has a very mild, watered-down taste. Another fun variety, Silver slicers, have a white skin, mild flavor, but excellent crunch. Try a couple of varieties to decide what you like best. Starting Seeds Indoors Indoor seed starting is a good tool to use if you struggle with cut worms in your garden, or you have a short growing season and need a head start. Cucumber plants don’t like their roots to be disturbed, so start seeds indoors with caution. Here are a few tips to help you succeed in starting cucumber seeds indoors. Use containers that will give the root system plenty of room so that you can minimize disruption when you transplant. Don’t start seeds too early. Wait until you’re two to three weeks ahead of your estimated last frost date. Use heat mats to warm the soil during germination. Turn on grow lights as soon as the seedlings break through the soil surface. Keep them watered well, but not soaked. Watch for white flies and fungus gnats while seeds are indoors. Give them plenty of air flow to combat mildew or algae growth on the soil surface. Direct Sowing Seeds I highly recommend starting seeds by sowing them directly into the ground where you intend to grow them. After your soil temperature has warmed to at least 65° Fahrenheit, you can sow your seeds in a place that receives four to six hours of direct sunlight per day. Choose a place with well-draining soil, add a little compost, and drop your seeds about 1/4 inch into the soil. Be sure that you water your seeds well until they germinate. A Deeper Dive Into the Cucumber Plant Stages Let’s cover more details about each of the cucumber plant stages so that you’ll know exactly what to expect during the growing season. Stage 1: Cucumber Seed Germination While awaiting for your little plants to burst forth from the soil, make sure that you keep the soil moistened well. If your soil temperatures are from 80-90° F, you may find that your seeds germinate at just three to five days. Cooler soil and air temperatures will cause cucumber seeds to take a little longer to germinate. That’s okay. The average time for the germination process is anywhere from three to ten days. Longer than ten days might be cause for concern. Be sure that your new babies continue to receive enough light and water. Stage 2: Seedlings During the seedling stage, your cucumber plants will begin with their cotyledons. This is the term for their first set of leaves, and they will help the young plant produce enough chlorophyll to get it growing into the next stage of life. Cotyledons will last for about the first two weeks of the plant’s life. The cotyledons on cucumber seedlings are round, oval-shaped. Don’t be alarmed that they don’t look like the regular cucumber leaves if this is your first time starting seeds. After about two weeks, the plant’s true leaves will begin to grow in as the cotyledons yellow and eventually die back. Now your plant will begin to grow more rapidly as long it’s watered well and is growing in fertile soil with plenty of organic matter. Stage 3: The Vegetative Phase (The Growing Stage) The vegetative stage of a cucumber plant refers to the period of growth when the plant is primarily focused on developing its vegetative structures such as leaves, stems, and roots, rather than producing flowers and fruits. During the vegetative phase, the cucumber plant undergoes rapid growth, with the primary aim of establishing a strong root system and producing lush foliage to support future fruit production. The plant absorbs nutrients from the soil through its roots and produces carbohydrates through photosynthesis to fuel its growth. Stage 4: The Flowering Stage I think this is my favorite of the cucumber plant stages because its a hopeful sign of what’s to come. Your cucumber plant will develop bright yellow flowers when it’s ready to fruit. The first flowers should appear around 40-55 days after planting in optimal conditions. It’s important to know what variety cucumber you’ve chosen to plant when it comes to pollination. Some cucumber flowers are self pollinating, while others need some cross pollination. You can achieve pollination by attracting pollinators into your garden to do the work for you, or you can use a Q-tip or small paint brush, gently rubbing the centers of both male and female flowers. Without pollination, you’ll grow no fruit. What’s the Difference Between Male and Female Flowers? Just like squash flowers, cross-pollinating cucumber plants will produce male and female flowers. The male flowers will have a tiny cucumber-looking fruit behind the flower stem, while the female flowers have a long-spindly stem. Once you’ve learned this, identifying the difference is simple. Female flowers usually develop first, followed by male flowers. Stage 5: Fruit Production During the fruiting stage of cucumber plants, the plant shifts its focus from leaf and stem growth to producing fruits. Again, knowing what type of cucumber you’ve planted is important to know how long to wait before cutting the fruit from the plant. During this stage of growth, cucumber vines may continue to grow, flowers continue to appear, and fruit development continues to produce. Stage 6: Harvesting Harvesting is the goal we gardeners are looking for at the end of the cucumber plant stages. Am I right? Your fruit will be ready to harvest at the desired size about 50-70 days after planting, depending on the variety. Use a clean pair of snips or cutters to harvest your fruit. Make sure that you leave a small stem on the cucumber to give you longer lasting storage in the refrigerator. Some cucumber fruits have more spines growing on them than others. I recommend wearing gloves during harvesting to avoid spiny splinters in your fingers. The spines will easily scrub off under running, cool water. Companion Plants Dill is my favorite companion to plant with cucumbers. I find it interesting that dill helps to deter pests like cucumber beetles away from the cucumber, and we use dill in our pickles. Nasturtiums, radishes, and marigolds may also help to repel pests from your cucumber plants. Common Issues in Cucumber Growth Some common difficulties when growing cucumbers are: Pests Disease Climate Pests As mentioned, cucumber beetles can be a problem as they like to eat cucumber flowers before they even fruit. The worst culprit that I deal with every year is the vine borer. The larvae will eat the plant from the inside out until the entire vine dies. This seems to happen overnight, but the reality is that it took a little time. Regularly checking your plants for pests will help you eliminate them more quickly. Other pests of the cucumber plant include aphids, spider mites, white flies, thrips, squash bugs, and cut worms. All of the cucumber plant pests can be handled with our recommended organic pest control measures, but starting with healthy soil is the best first step. Disease These common diseases also bring tough battles to us each year. Bacterial wilt affects cucumber plants by causing wilting, yellowing of leaves, and eventual plant collapse due to the blockage of water-conducting tissues by bacteria. Powdery mildew affects cucumber plants by covering their leaves with a white, powdery growth, leading to reduced photosynthesis and stunted growth. Severe infestations can cause leaf yellowing, premature leaf drop, and diminished fruit production. Disease can usually be tamed by using Copper fungicide on your plants. Make sure that you remove any diseased foliage to save the rest of the plant. Good air flow will help to prevent disease in your cucumber plants. Last, choosing varieties that are produced for disease resistance will help. Hot Weather Although cucumbers are a warm-season crop, they don’t like hot weather. Once your air temperatures reach 90°F, your cucumber plant may begin to drop its flowers before they develop into tiny fruits. Regular watering and some shade cloth may help. Seek out varieties that tolerate the extreme heat, such as the Armenian Cucumber. This is truly a melon, but looks much like a cucumber and tastes just like it too. Conclusion to Cucumber Plant Stages I hope that you’re encouraged to grow your own cucumbers and see all of the cucumber plant stages in your own backyard vegetable garden. Now that you know what to expect during the growing season, you’re prepared to grow your own cucumber plant(s) for yourself and your loved ones. You may also enjoy reading How to Plant Romaine Lettuce Seeds: A Complete Grwoing Guide Happy Growing! Donna @ Hazel Belle Farm Donna and her family have been homesteading for most of their 20+ years together in some shape or fashion. She currently lives on their 20 acre farm where they grow as much food as possible. What started as a just a few laying hens, has grown into large gardens, pastured poultry, pork, and lamb. They are continuously evolving their small farm to not suit their family’s needs, but also providing to their local community. Donna’s favorite part of the family farm is her self-built micro-dairy, where she gets to love on dairy cows while serving her local community. Milking, cheesemaking, and processing dairy have become the soul of their homestead and the center of their farm. If you liked this post, perhaps you’ll like these too! Gardening Homesteading