Riesling Grape

A noble white wine grape from Germany's Rhine region, prized for its ability to express terroir and produce wines ranging from bone-dry to lusciously sweet. Riesling is one of the most cold-hardy premium wine grapes, making it suitable for cooler climates. The late-ripening clusters develop complex floral and mineral aromatics on steep, well-drained slopes.

Riesling is propagated exclusively by vegetative means through dormant hardwood cuttings grafted onto appropriate rootstocks. Select cuttings from certified virus-free mother vines during winter pruning, choosing mature wood with three to four well-developed nodes. Bench grafting onto rootstocks like SO4 for vigor control or 5BB for limestone tolerance is standard. Rootstock selection is critical for Riesling, as the variety's expression of terroir depends on controlled vigor and deep root penetration. Nursery-grown grafted vines are planted in their permanent positions after one year of growth.

The Season Plate

Your Riesling Grape Year

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

Sow Riesling Grape Mar – Apr, pick Sep – Nov. Set your climate below and every date on this plate re-times itself.

Sowing window

Mar – Apr

re-timed to your frost dates

Plant out

after Apr 2

once frost risk has passed

First picking

around Mar 14

≈ 1095 days from sowing · 2 to per plant

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

Week-by-week Riesling Grape 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

Riesling thrives in cool to moderate climates where a long, slow ripening period allows the grapes to develop their hallmark aromatic complexity and racy acidity. The ideal site is a steep, south-facing slope with slate, schist, or limestone soils that provide excellent drainage and reflect heat back onto the vine canopy. Riesling is remarkably cold-hardy, surviving winter temperatures down to minus 20 degrees Celsius, making it one of the few premium varieties suitable for northern wine regions. Plant grafted vines at 1.2 to 1.5 meter spacing in rows 1.8 meters apart.

Train vines using a single or double Guyot cane system, which is traditional in Germany and Alsace, or use a vertical shoot positioning system with a bilateral cordon. Riesling produces moderate vigor and naturally small to medium clusters with thick-skinned berries that resist botrytis better than most white varieties. Leaf removal in the fruit zone is less critical than for thin-skinned varieties, but some exposure improves ripening and develops the characteristic petrol note in mature wines.

Riesling is a late-ripening variety that benefits from an extended hang time through October or even November in some regions. This extended ripening period allows grapes to develop incredibly complex flavors while maintaining high natural acidity, which is the backbone of all great Riesling wines. Monitor sugar accumulation carefully, as the variety can produce wines at many sweetness levels depending on harvest timing. Apply moderate amounts of compost and avoid excess nitrogen to maintain the mineral-driven character prized in this variety.

Chives and hyssop planted along vineyard rows attract beneficial insects and may help deter aphids with their sulfur compounds. Low-growing white clover between rows fixes nitrogen gently without promoting excessive vine vigor. Native wildflower mixes in vineyard margins provide habitat for predatory insects that control leafhoppers and mites. Avoid heavy companion plantings that compete for water on the well-drained slopes where Riesling performs best, as the vines need consistent moisture access through deep root systems.

The Society Table

Hyssop belongs beside it.

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

Grows well in the company of · 2

HyssopChives

Keep apart · 0

no recorded foes

Plant Riesling Grape with good neighboursThe planner flags conflicts before they're in the ground

Riesling is uniquely expressive of its growing site, making soil selection critical for wine character. Slate and schist soils produce wines with flinty mineral notes, limestone gives broader structure, and volcanic soils contribute smoky complexity. All sites must have excellent drainage, as Riesling roots are susceptible to waterlogging. Maintain soil pH between 5.5 and 7.5 depending on the substrate. Apply organic compost sparingly in autumn, and supplement with magnesium if growing on acidic slate soils where deficiency is common. Avoid heavy fertilization that dilutes the terroir expression.

Ideal Temperature

Hardiness Zone Compatibility

Riesling harvest timing depends entirely on the desired wine style. For dry wines, pick when acidity is still high and sugar reaches 19 to 21 Brix, typically in September. For sweeter styles like Spatlese and Auslese, leave clusters to hang into October or November to concentrate sugars while retaining acidity. For ice wine, grapes must freeze on the vine at minus 7 degrees Celsius or below. Harvest early in the morning when fruit is cool. Handle gently to avoid oxidation of the delicate aromatics, and process white grape juice immediately with minimal skin contact.

Storage & Preservation

Riesling grapes must be pressed and processed within hours of harvest to preserve the delicate floral and citrus aromatics. Whole-cluster pressing with minimal skin contact produces the most aromatic wines. The juice should be cold-settled before fermentation to remove solids. Riesling wines are among the most age-worthy whites in the world, developing complex petrol and honey notes over decades when produced with high acidity. Fresh grapes can be frozen for later juicing or dried into golden raisins, though the variety is seldom used for table consumption.

Troubleshooting Common Problems

The primary challenge with Riesling is the long ripening period, which exposes the crop to autumn rain and frost risk in cooler vintages. Downy mildew is a greater threat than powdery mildew for this variety, especially in wet growing seasons. The variety's tendency to retain extremely high acidity can result in harsh, unbalanced wines if not managed through appropriate site selection and harvest timing. Bird damage increases as hang time extends into late autumn. Spring frost can damage early growth in valley floor sites, making slope plantings essential in marginal climates.

Growing Tips

1. Choose the right site above all else: Riesling demands excellent drainage, good air circulation to prevent fungal disease, and maximum sunlight exposure. A south-facing slope (in the Northern Hemisphere) with at least 6 to 8 hours of direct sun daily is ideal, and even a modest slope dramatically improves cold air drainage to protect sensitive spring shoots.
2. Plant Riesling on a dwarfing or semi-dwarfing rootstock such as 3309 Couderc or 101-14 Mgt if you are in a region with phylloxera or nematode pressure — own-rooted vines are only safe in phylloxera-free sandy soils or very isolated inland sites.
3. Train your vine to a vertical shoot positioning (VSP) trellis system with two fruiting wires at 60 and 90 cm (24 and 36 inches) and two catch wires at 140 and 170 cm (55 and 67 inches). This system makes canopy management straightforward and is the standard for high-quality Riesling production worldwide.
4. Resist the urge to over-fertilize: Riesling on moderately fertile soil needs little or no supplemental nitrogen. Excess vigor produces excessively shaded canopies, elevated disease pressure, and dilute fruit flavors. If growth is weak, a modest spring application of compost or a low-nitrogen balanced fertilizer is sufficient.
5. Manage canopy density aggressively through the growing season by removing lateral shoots that develop in the fruit zone, tucking upright shoots between catch wires, and removing a proportion of leaves on the morning-sun side of the canopy 4 to 6 weeks after flowering to improve light penetration and air circulation.
6. Riesling is moderately susceptible to powdery mildew and downy mildew in humid climates. Develop a consistent preventive spray program using organic sulfur (for powdery mildew) and copper hydroxide (for downy mildew), applied on a 10 to 14 day schedule from bud break through veraison, extending after rain events.
7. Thin the crop to one cluster per shoot in years 2 through 4 and to no more than 1 to 1.5 clusters per shoot on mature vines in heavy set years. Overcropping is the single most common mistake home growers make and leads to late, uneven ripening and thin-flavored fruit that never achieves full aromatic development.
8. In cold-climate regions (USDA zones 5 and 6), protect the vine's graft union through the first several winters by mounding 20 to 30 cm (8 to 12 inches) of soil over the base of the trunk after leaf drop, then removing the mound in spring before buds swell. This protects the most vulnerable part of the plant from deep freezing.
9. Harvest Riesling in multiple passes if possible rather than picking all clusters at once. Earlier-ripening clusters in sun-exposed positions can be harvested first at peak freshness for immediate eating, while clusters in shadier positions are left to hang and develop additional complexity — mimicking the selective harvesting practiced in Germany's finest Riesling estates.
10. Store harvested Riesling grapes unwashed in a single layer on a shallow tray in the refrigerator at 0 to 2°C (32 to 35°F) with high humidity. Properly stored clusters will remain in excellent condition for 3 to 5 weeks, giving you an extended window to enjoy fresh fruit from a single harvest.