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The single biggest lever for getting more tomatoes off every plant is temperature control at flowering, since a tomato flower that doesn’t get pollinated within about 50 hours of opening drops off the plant without ever setting fruit. Get that right, along with the right variety, deep planting, consistent water, and pruning that actually matches your plant’s growth habit, and a single healthy tomato plant can easily produce 10 to 15 pounds of fruit over a season, sometimes 20 to 25 pounds under good conditions.
I’m an organic permaculture specialist, and tomatoes are the crop I get asked about more than any other, precisely because so much can go wrong between a flower opening and a ripe fruit landing in your hand. Growing tomatoes also brings me back to the early days in my grandma’s garden, where I watched her tend her plants like they were her children and pull in a bumper harvest every single year. I didn’t understand the science behind what she was doing back then. I just knew her tomatoes were the sweetest, juiciest fruits I’d ever tasted. Now that I’ve spent years growing my own and troubleshooting every problem a tomato plant can throw at you, I can tell you exactly what she was doing right, and what most guides leave out entirely.
At a glance, the fastest ways to get more tomatoes are:
- Choose a high yield, disease resistant variety suited to your climate
- Plant deep, burying up to two thirds of the stem
- Keep flowering temperatures in the 55 to 85°F (13 to 29°C) range whenever you can
- Water deeply and consistently rather than little and often
- Prune determinate and indeterminate varieties differently, since the same advice does not apply to both
- Harvest ripe fruit every two to three days to keep the plant producing
Choose the Right Tomato Plant Variety
Choosing the right variety is the first and easiest lever to pull for a bigger harvest. Determinate tomato varieties grow to a fixed height, usually 24 to 30 inches, then stop growing and ripen most of their fruit within a four to six week window. Indeterminate varieties keep growing, flowering, and setting new fruit continuously until frost kills them, and generally need staking, caging, or trellising since they don’t stop growing on their own the way determinate varieties do. Both habits have their place. Determinate varieties are the better choice if you want one big harvest for canning, while indeterminate varieties suit gardeners who want a steady trickle of fresh tomatoes all summer.
For sheer volume, look for high yield varieties like Celebrity, Early Girl, or Sweet Million, all three of which are widely available and reliable performers across most US climates.
You also want to choose tomato plants that thrive in your climate. Speak to your neighbors and find out which varieties they have the most luck with. If you have a short season, go with early-cropping varieties. If you’re in an area prone to downy mildew, choose a variety that’s resistant to that disease and that thrives in your hardiness zone.
Whether you go with determinate tomato plants or indeterminate tomato plants, cherry tomatoes or beefsteak types, the key is to choose ones that do best in your region and specifically your local microclimate.
Harden Off Tomato Plant Seedlings
Hardening off your tomato seedlings is a vital step in transitioning them from their sheltered indoor start to the great outdoors, and it usually takes 7 to 14 days. This process acclimatizes your plants to outside conditions, minimizing transplant shock and promoting healthier, more productive growth. It’s much the same process as hardening off pepper seedlings.
Start about two weeks before you plan to transplant, once outdoor temperatures stay above 50°F (10°C). Place your seedlings outside in a sheltered, shady spot for an hour or two on the first day, then extend the outdoor time and introduce direct sunlight bit by bit over the following days. Watch the weather closely and bring plants back inside if conditions turn harsh, and adjust your watering as needed, since outdoor conditions dry seedlings out faster than an indoor windowsill does. Toward the end of the two week window, leave your seedlings outside overnight as long as temperatures stay mild, which finishes the acclimatization before you plant them out for good.
Test Your Soil
Tomatoes need slightly acidic soil, in the 6.2 to 6.8 pH range, and testing before you plant is the only reliable way to know whether your garden already meets that mark. Tomatoes, like all plants, need certain nutrients to grow and produce fruit, and testing your soil tells you its current pH level along with its existing nutritional composition. That knowledge is what guides every amendment decision that follows, rather than guessing and hoping for the best.
Make Soil Amendments
Making soil amendments based on your test results does more for your harvest than blanket-applying products that sound helpful. The goal is to fill only the gaps your soil actually has, and the test is what tells you where those gaps are.
Compost is the gardener’s gold and belongs in every tomato bed regardless of what your soil test shows. It improves structure, moisture retention, and nutrient content, and you can make it at home from kitchen scraps like fruit and vegetable peels, coffee grounds, and eggshells, or yard waste like leaves and grass clippings. Work a generous amount of well-rotted compost into your planting area a few weeks before you plant. Aged manure does much the same job. Chicken, cow, or horse manure all work well, but make sure it’s well-aged or composted first, or you risk burning your plants or introducing weed seed.
Where most gardeners go wrong is phosphorus. Bone meal is often recommended as a blanket fix for fruiting problems, since phosphorus supports flowering and fruit set, but many garden soils already have enough phosphorus, and adding more when it isn’t needed does nothing for your harvest and can wash into local waterways. Skip the bone meal unless your soil test specifically calls for more phosphorus.
Worm castings, sometimes called black gold, are a safer general-purpose amendment. They add a broad range of nutrients without the phosphorus overload risk, and they improve soil structure and moisture retention at the same time.
If you have the season for it, planting a cover crop like legumes or buckwheat in the off-season significantly improves soil health before your tomatoes ever go in the ground. Legumes add nitrogen, and any cover crop improves structure and helps prevent erosion. Till it into the soil a few weeks before you plant.
Wood ash can help if your soil test shows it’s too acidic, since it raises pH and adds potassium and calcium, but use it sparingly and only when your test confirms you need it. It’s easy to push your pH too high if you’re not working from actual numbers.
Epsom salts are one of the most persistent gardening myths out there. Epsom salt is magnesium sulfate, and unless your soil test shows an actual magnesium deficiency, which is rare, adding it does nothing for fruit production and can work against you. Excess magnesium competes with calcium for uptake into the plant, and calcium deficiency is what causes blossom end rot, so sprinkling Epsom salt around your tomatoes without a confirmed deficiency can make that problem worse rather than better.
Prepare the Growing Space
An old gardening adage says that if you give a plant the right home, it will grow itself, and there’s real wisdom in that. How you prepare the growing space sets the stage for the whole season.
Before planting tomatoes, clear the designated space of any weeds, since they compete with your tomato plants for nutrients, water, and sunlight. Look out for rocks or other debris that could obstruct the roots and remove them, which matters even more if you’re converting lawn or non-gardening space into a bed. Once the area is cleared, loosen the soil with a garden fork or tiller so roots can penetrate easily to access water and nutrients, and this also helps mix in any amendments you’ve added.
Sunlight matters more than almost anything else here. Tomatoes need at least six hours of direct sun a day to grow robust, high-yielding plants, so when choosing a spot, aim for the sunniest part of your garden.
Plant Tomatoes Deep
One of the lesser-known tips for getting more fruit is to plant your tomatoes deep. Tomatoes have a rare ability among garden plants in that they can grow additional roots along any part of their stem that’s buried in soil, an adaptation to their native habit of spreading along the ground and rooting at intervals to seek out water and nutrients.
When you plant your tomatoes, instead of setting them at the same depth they sat in the pot, bury up to two thirds of the plant, including the lower leaves. This might seem counterintuitive. After all, most plants would suffocate if planted this deep, but tomato plants are the exception and actually grow best this way, since the extra buried stem develops into extra roots that give the plant more access to water and nutrients.
Dig a hole deep enough to accommodate two thirds of your tomato plant. If your seedling is tall or leggy, dig a trench three to four inches deep instead, lay the plant sideways, and gently bend the top third upward. The plant will grow toward the sun on its own. Remove the lower leaves from any part of the stem that will be buried, then backfill and press the soil gently around the base.
Give Your Tomatoes Plenty of Space
Proper spacing is essential, since tomato plants need good air circulation to prevent disease and adequate room for their roots to spread. Depending on the variety, allow 24 to 48 inches between each plant, with indeterminate varieties needing space toward the higher end of that range.
Give Your Tomato Plants Support Early On
If you’ve grown tomatoes before, you know these aren’t plants that stay small and tidy. As they grow, they become heavy with foliage and fruit and can quickly turn unruly if left unsupported. Providing sturdy support early on avoids root damage later and can increase both yield and fruit quality.
Choose something sturdy, since tomatoes can get large. Stakes, cages, or trellises all work well as support systems, reducing the risk of branches bending or breaking under the weight of the fruit. That structural support saves the plant energy it would otherwise spend mending broken branches, energy it can put toward producing more tomatoes instead. Supporting your plants also keeps foliage and fruit off the ground, which reduces disease and pest problems.
Protect Tomatoes From Frost
A sudden frost can spell disaster for your tomato plants. Keep an eye on the forecast and be ready to cover your plants or bring them inside if frost is predicted. Tomato plants are cold sensitive, and even sustained temperatures under 50°F (10°C) are enough to stunt growth and reduce yield.
Watch the Temperature When Your Plants Are Flowering
Temperature extremes during flowering are the most frequent culprit behind a healthy-looking tomato plant that produces little or no fruit. Each flower has to be pollinated within roughly 50 hours of opening or it dies and drops off without setting fruit, and pollination itself only works within a fairly narrow temperature window.
On the hot end, sustained daytime temperatures above 85°F combined with nighttime temperatures above 70°F stress the plant enough that flowers drop before pollination can happen at all. On the cold end, nighttime temperatures below 55°F (13°C) can interfere with pollen development or make it sterile, and fruit generally won’t set until nights stay above that mark for at least two consecutive nights.
There isn’t much you can do to change the weather, but you can work with it. If a heat wave is forecast during flowering, water deeply the day before and consider light afternoon shade cloth to take the edge off the hottest hours. If a cold snap threatens young flowering plants, the same row covers you’d use for frost protection will buy you a few crucial degrees. Once temperatures moderate back into the 60 to 85°F (16 to 29°C) range, flowering and fruit set typically resume within a week or two without any other intervention needed.
Provide Consistent Water
The watering needs of tomato plants are simple in theory, yet many gardeners struggle to get them right. Consistent, deep watering is crucial for tomato plants to thrive and produce a healthy crop, since tomatoes prefer their soil to stay evenly moist, never waterlogged and never bone dry. This consistency helps the plants absorb nutrients and supports steady growth, and it also heads off blossom end rot, which is triggered by exactly the kind of moisture swings that come from watering shallowly and infrequently.
Water deeply enough to moisten the soil to at least 6 to 8 inches down, which encourages roots to grow deep in search of moisture and makes the plant far more resilient during dry spells. How often depends on your soil and climate. In most gardens that means watering once every two to three days, though hot, dry climates can push that to once a day. Water in the morning whenever you can, since it gives the plant time to drink before the sun evaporates the moisture and keeps the foliage dry overnight, cutting down on fungal disease. Whenever possible, water at the base of the plant rather than from above, directing moisture straight to the roots while keeping the leaves dry. Drip irrigation makes this almost effortless.
RELATED POST: The 4,000-Year-Old Watering Trick That Still Beats Your Hose
Use Mulch
Mulch helps retain moisture, regulates soil temperature, and suppresses weeds. Organic mulches like straw or shredded leaves work best, since they break down over time and enrich your soil as they go. Apply a layer three to four inches deep, thick enough to meaningfully suppress weeds without smothering the base of the plant.
Understand How Tomato Flowers Actually Get Pollinated
Tomato flowers pollinate themselves about 96 percent of the time, since each flower carries both male and female parts wrapped tightly together, but the pollen still needs to be jostled loose before it can reach the female part of the flower. In an open garden, wind usually provides enough movement to do this on its own.
Bumblebees improve on wind pollination through a technique called buzz pollination, where the bee grips the flower and vibrates its wing muscles at high speed to shake pollen loose more thoroughly than wind alone can manage. Just one or two bumblebee visits to a flower can push fruit set above 80 percent, compared to roughly 30 percent for flowers that see no pollinator visits at all. Honeybees, interestingly, don’t buzz pollinate, so if you’re planting flowers nearby to draw pollinators in for your tomatoes, it’s genuinely worth favoring plants that also attract bumblebees and other native bees.
On still, calm days, or if you’re growing tomatoes in a greenhouse or under row cover where wind can’t reach the flowers, you may need to do the jostling yourself. Use a small, dry paintbrush, an electric toothbrush, or just your fingers to gently vibrate each flower cluster, or tap the plant’s main stem firmly once a day around midday, which is when pollen is most viable.
Use Companion Planting
You all know by now that I am a huge advocate of companion planting. Some may say I’m a little bit obsessed, but honestly, it works. It’s so good for building soil health and for maximizing plant health and fruit yield that it’s hard to overstate how simple and effective it really is. When it comes to boosting your tomato yield, companion planting can be an effective strategy, aiding in pest deterrence, growth enhancement, and even flavor improvement.
Basil is the classic tomato companion, and not just in the kitchen. Growing it alongside your tomatoes can help repel tomato hornworms and other pests, and plenty of gardeners swear it improves the flavor of the fruit as well. Carrots make good neighbors too, since their roots help loosen the soil as they grow, giving tomato roots more room to expand, and their feathery tops provide a bit of shade for young tomato plants during hot weather. Marigolds earn their place for more than looks. They’re well known for deterring a range of pests, including the nematodes that can damage tomato roots.
A few plants work against you rather than for you. Potatoes belong to the same nightshade family as tomatoes and are susceptible to many of the same diseases, so planting them together increases the risk that an infection in one spreads quickly to the other. Fennel is allelopathic, meaning it releases substances into the soil that inhibit the growth of neighboring plants, so it’s best kept well away from your tomatoes. Kohlrabi has also been observed to stunt tomato growth when planted too close.
Provide Plenty of Natural Fertilizer
Regular applications of a natural, high-quality fertilizer feed your tomato plants the nutrients they need to produce a bumper crop, but the right fertilizer depends entirely on what your soil test says you’re missing. Nitrogen supports leafy growth, phosphorus and potassium support flowering and fruit production, and too much of any one of them at the wrong time works against you rather than for you. As mentioned above, check my post on DIY fertilizers for easy, effective, natural options tailored to what your soil actually needs.
RELATED POST: The Ultimate Guide to DIY Organic Fertilizers
Prune Determinate and Indeterminate Tomatoes Differently
Pruning helps some tomato plants and can quietly work against your goal of maximum fruit on others, so the first thing to know is which type you’re growing before you reach for the pruners. A sucker is the small shoot that grows from the joint between the main stem and a branch, and removing suckers redirects the plant’s energy, but exactly how much pruning helps depends on growth habit.
Indeterminate varieties benefit the most from regular pruning, since left unchecked they put out far more foliage than fruit clusters can use. Removing suckers throughout the season keeps the plant’s energy focused on fruit that’s already set rather than on ever more leafy growth, and it improves airflow and light penetration, which helps fruit ripen more evenly and lowers disease risk.
Determinate varieties are a different story. Because they grow to a fixed height and set a defined number of fruit clusters before stopping, heavy pruning trims away some of the very growth that would have produced more tomatoes. If you do prune a determinate plant, remove suckers from the bottom three leaves only, once they reach 3 to 4 inches long, rather than pruning throughout the season. This light pruning can still improve earliness and fruit size, but if raw pound-for-pound yield is your only goal, a determinate plant left largely unpruned will often out-produce a heavily pruned one, since every sucker you remove is potential fruit you’re cutting away before it ever had the chance to set.
Whichever type you’re growing, always remove any leaves or stems that start touching the soil, since this cuts down on soil-borne disease regardless of your pruning approach.
Harvest Tomatoes Frequently
Regular harvesting encourages more fruit production. Pick tomatoes as soon as they’re ripe to keep your plants productive, since leaving mature fruit on the vine signals to the plant that it can slow down.
Keep Tomato Plants Healthy
Monitor your plants closely for any signs of disease or pests. Healthy plants are far more productive than stressed or sick ones, so rotate your crops annually to prevent diseases from building up in the soil.
FAQs
How many tomatoes can one plant produce?
A single tomato plant can produce 10 to 15 pounds of tomatoes per season. With proper care and the right conditions, some varieties can yield up to 20 to 25 pounds.
Why is my tomato plant flowering but not producing fruit?
Temperature is the most common cause. Flowers won’t set fruit when daytime temperatures run above 85 to 90°F alongside nighttime temperatures above 70°F, or when nights drop below 55°F. Poor pollination from still air or a lack of pollinator activity is the other common cause, and hand pollinating with a small brush or by tapping the flower cluster usually solves it.
Does pruning tomato plants actually increase yield?
It depends on the variety. Pruning genuinely increases total yield in indeterminate varieties by redirecting energy from excess foliage into fruit. In determinate varieties, heavy pruning can reduce total pound-for-pound yield, even though it improves fruit size and earliness, since you’re removing growth that would otherwise have produced more tomatoes.
Are coffee grounds good for tomato plants?
Yes. Coffee grounds can be used as a mulch or composted and used as a soil amendment. They add organic matter and nitrogen to the soil, but use them sparingly to avoid making the soil too acidic.
Should I prune the lower leaves of my tomato plant?
Yes, it’s a good idea to prune the lower leaves to improve air circulation and prevent disease. Leave the upper leaves in place, since they’re essential for photosynthesis.
How often should I fertilize tomato plants for more fruit?
Once your soil test tells you what your soil needs, apply fertilizer when you first transplant, then again when the first fruits start to enlarge, and roughly every three to four weeks after that through the growing season. Skip additional nitrogen once flowering starts unless your plants show clear signs of deficiency, since excess nitrogen at that stage encourages leafy growth over fruit.
Does nitrogen fertilizer increase tomato yield?
Nitrogen is essential for leafy growth, but too much of it results in a bushy plant with few tomatoes. Tomatoes need a balanced fertilizer, with phosphorus and potassium doing most of the work of promoting fruit production once the plant is established.
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