Black Krim Tomato

A dark heirloom from the Black Sea region prized for flattened mahogany-purple fruits with a salty-sweet, slightly smoky flavor. Black Krim is not a generic novelty tomato: it is one of the signature flavor varieties for gardeners who want a slicer with real depth, umami, and personality. When grown well, the fruits feel luxurious and slightly wild at the same time. They are often irregular, often green-shouldered, and rarely perfect-looking, but that rough beauty is part of the point. This is a tomato chosen for the plate, not for cosmetic uniformity. It excels in warm summers where steady moisture and good airflow let the fruit ripen slowly and concentrate flavor. Gardeners who enjoy learning the subtle cues of heirloom ripeness often end up treating Black Krim as one of the indispensable varieties in the entire tomato patch.

Sow 6 mm deep in sterile seed-starting mix at 21-27°C (70-80°F). Germination is usually straightforward if bottom warmth is steady and the mix never crusts over or dries out completely.

Give strong light immediately after emergence and keep it close enough that seedlings stay stocky. Black Krim, like many heirloom beefsteak types, loses quality quickly if it spends too long stretched, chilled, or root-bound on a windowsill. Pot up early and bury part of the stem to encourage stronger root development.

During hardening off, move gradually. Do not rush a tender heirloom into cold wind and bright sun all at once. The best transplants are short, dark-leaved, and still actively growing when they go into warm soil, because that smooth start shows up later in fruit size and flavor.

The Season Plate

Your Black Krim Tomato Year

Composed for Zone 7 · typical seasons · frost passes Apr 2, returns Nov 1

Sow Black Krim Tomato Mar – May, pick Jul – Sep. Set your climate below and every date on this plate re-times itself.

Sowing window

Mar – May

re-timed to your frost dates

Plant out

after Apr 2

once frost risk has passed

First picking

around Jun 3

≈ 80 days from sowing · 3.5-5 kg per plant

Composed for —ColdTemperateMildWarmUse my locationUsed once to set your season · only the zone is kept

Week-by-week Black Krim Tomato reminders watering, feeding and pruning, timed to your dates

In the app

Frost alerts for your garden a warning before a cold night costs you the crop

In the app

Succession sowing dates so the picking never gaps mid-season

In the app

Prefer email? Get monthly reminders in the Almanac

Keep my dates — free for 7 daysWe nudge you as each window opens · cancel anytime

Start Black Krim indoors 6-8 weeks before the last frost and transplant into rich, warm soil only after nights stay above 10°C (50°F). This indeterminate heirloom needs a tall stake or cage from the start and enough spacing that foliage dries quickly after rain or dew.

Black Krim performs best when heat, moisture, and support all stay consistent. Mulch heavily, water deeply, and prune lightly to one or two leaders for airflow. The variety often keeps green shoulders at maturity, so ripeness is judged by feel, aroma, and the dusky mahogany body color rather than by a totally uniform finish.

This is not the tomato to grow carelessly in a cold, crowded, or erratically watered patch and still expect legendary results. Black Krim’s famous flavor develops when the plant moves steadily through warm weather without repeated stress checks. Rich soil, a deeply mulched root zone, and regular tying matter because they keep the plant investing in broad healthy leaves and slow even ripening rather than in emergency recovery.

Treat it like a premium slicer rather than like a bulk cropper. A little discipline goes a long way: remove only the lower leaves that threaten disease, avoid overfeeding with nitrogen, and watch fruits closely once they begin to darken. If you manage the plant for flavor instead of cosmetic perfection, Black Krim will reward you with one of the deepest, most savory-tasting tomatoes you can grow at home.

Plant with basil, parsley, marigolds, and carrots. These companions help diversify the bed, attract beneficial insects, and keep the root zone lively without competing too aggressively.

Basil is especially useful because it fits the same warm, sunny irrigation rhythm without shading the base too heavily. Marigolds add pollinator and predator interest around the bed, while parsley and carrots make good lower-layer companions that do not demand the same heavy vertical space.

Give Black Krim slightly more breathing room than you might give a tidy hybrid slicer. The foliage can get dense, and the broad heirloom fruit benefits from airflow and easy visual access. Avoid fennel and crowded brassicas, which compete awkwardly and can turn the planting into a humid, hard-to-manage block.

The Society Table

Basil belongs beside it. Cabbage doesn't.

Old growers' knowledge, checked against Black Krim Tomato's real companion table below — test any plant you're growing.

Grows well in the company of · 4

BasilCarrotMarigoldParsley

Keep apart · 2

CabbageFennel

Plant Black Krim Tomato with good neighboursThe planner flags conflicts before they're in the ground

Related growing guides

Herbs

Basil

A good companion for Black Krim Tomato

Vegetables

Carrot

A good companion for Black Krim Tomato

Flowers

Marigold

A good companion for Black Krim Tomato

Herbs

Parsley

A good companion for Black Krim Tomato

Grow in fertile, compost-rich, well-drained soil with a pH of 6.0-6.8. Black Krim performs best in a bed that holds moisture evenly without staying waterlogged, because the variety’s large heirloom fruits react quickly to repeated wet-dry swings.

At planting time, work in mature compost and a moderate all-purpose organic fertilizer rather than building a rich high-nitrogen bed. Too much nitrogen gives you dramatic foliage but a less disciplined plant, softer growth, and fruit flavor that can feel washed out.

Once the first clusters set, shift toward potassium- and phosphorus-supporting fertility. Side-dressing with compost, a low-nitrogen tomato feed, or gentle liquid feeding through peak fruiting usually gives better results than heavy feeding all at once. The target is not maximum vegetation; it is a steady vine carrying concentrated flavorful slicers.

Ideal Temperature

Hardiness Zone Compatibility

Harvest when fruits are fully sized, heavy, and just slightly soft, with rich red-brown color deepening beneath olive shoulders. Use pruners and handle carefully because ripe heirloom flesh bruises easily.

The common mistake is waiting for the shoulders to lose all green. On Black Krim that usually means you are harvesting too late. A truly ready fruit smells strongly at the stem end, feels dense and heavy in the hand, and gives slightly near the blossom end even if the upper shoulders still show olive or bronzed coloring.

Morning harvest is ideal, especially in hot weather. If storms are coming, pick fruits that are nearly ready rather than gambling on another day of vine time. A single hard rain can split the shoulders, flood the flesh with extra water, and flatten the very concentration that makes the variety worth growing.

Storage & Preservation

Best kept at room temperature for only a few days and eaten fresh. Extra fruit can be roasted into smoky sauce, blended into dark gazpacho, or frozen after cooking for later soups and pasta dishes.

Do not refrigerate prime Black Krim fruit unless there is no alternative. Cold temperatures dull the layered savory notes and muddy the texture. If a fruit is at peak quality, the best use is almost always immediate fresh eating: thick slices with good olive oil, torn basil, soft cheese, and bread.

For preservation, think small-batch and flavor-first. Roasting concentrates the dark umami beautifully, and cooked puree freezes far better than raw slices. Slightly cracked but still sound fruits are perfect for same-day gazpacho, roasted tomato pans, tart filling, or a quick smoky salsa.

Troubleshooting Common Problems

The main issues are cracking after rain and uncertainty about ripeness because the shoulders often stay green. In cool summers the flavor can skew sharper, while in humid climates foliage needs airflow to avoid fungal decline.

Another common disappointment is fruit that looks dramatic but tastes flatter than expected. That usually comes from one of three things: not enough sustained warmth, too much nitrogen, or harvesting early because the color still seems confusing. Black Krim often needs more confidence from the grower than standard red slicers do.

In wet spells, the plant also shows its heirloom temperament quickly. Broad fruits split at the shoulders, skins roughen, and dense foliage can move toward fungal trouble in a short time. The cure is steady, boring discipline: mulch, airflow, even watering, and close observation as fruits approach maturity.

Growing Tips

1. Wait until the soil is genuinely warm before transplanting. Tomatoes that sit in cold spring ground often lose weeks of momentum.
2. Plant deeply so buried stem sections root along their length, giving better drought resilience and nutrient uptake.
3. Use strong support from day one. Tomatoes are easier to manage when they are trained early rather than rescued later.
4. Mulch heavily to stabilize soil moisture, reduce splash-borne disease, and protect flavor by preventing hard wet-dry swings.
5. Water deeply rather than constantly sprinkling. Consistency matters far more than sheer volume.
6. Do not overfeed with nitrogen once flowering begins, or you will get foliage at the expense of fruit.
7. Harvest promptly in hot or wet weather, because quality can decline very quickly once fruit reaches peak ripeness.
8. Learn ripeness by touch and aroma, not by waiting for the shoulders to lose all green.
9. Pick before major rain events whenever possible because this heirloom can crack suddenly once nearly ripe.