Here is the honest truth about blackcurrants in Zone 12: they will not fruit here. Blackcurrants are a cool-climate bush that needs a cold winter to flower and fruit, and Zone 12, with winter lows of 50 to 60°F and no frost, cannot give them the chill they need. A bush may grow leaves in the tropics, but it will not give you currants. This guide explains why, and what to grow instead.
Like every crop in the tropics, blackcurrants rewards gardeners who work with Zone 12's seasons — the cooler, drier months and the hot, wet months — rather than against them. The planting calendar hub gives the Zone 12 picture month by month, and our guide to when to plant blackcurrants in Zone 11 shows how the timing shifts in a cooler zone.
Zone 12 at a glance
USDA Zone 12 covers the warmest, most tropical parts of the United States — Hawaii, Puerto Rico, Guam and the U.S. Virgin Islands. Winters are warm, with average winter lows of 50 to 60°F, and the growing season never really ends.
Zone 12 is frost-free year-round: there is no average last spring frost and no average first autumn frost. That means you plant by heat and by the wet and dry seasons, not by frost dates. These are USDA zone averages, not exact figures for any one garden — always check your local extension service and the forecast before planting.
| Detail | Zone 12 guidance |
|---|---|
| Average winter low | 50 to 60°F |
| Average last spring frost | Frost-free (no frost dates) |
| Average first autumn frost | Frost-free (no frost dates) |
| Days to germination | 14–28 days |
| Days to maturity | 365–730 days |
| Sowing | start indoors or direct sow |
| Sun | full sun |
| Soil pH | 6.0–6.5 |
| Spacing | 48–60 inches |
| Water needs | moderate |
| Cold tolerance | hardy |
When to plant blackcurrants in Zone 12
There is no good time to plant blackcurrants in Zone 12, because the problem is not timing — it is chill. Blackcurrants need a cold winter to break dormancy and set fruit, and Zone 12, frost-free with winter lows of 50 to 60°F, cannot provide it. Bushes take 1 to 2 years to fruit in a suitable climate, but in Zone 12 they simply do not fruit. If you want dark berries, grow a tropical alternative instead, and check your local extension service for fruit that suits your area. See the Zone 12 November planting guide for what else to plant that month.
Starting blackcurrants in Zone 12
Do not start blackcurrants from seed in Zone 12 — seed germinates in 14–28 days, but a seedling will not come true to variety and will not fruit in the tropics. Even nursery bushes, planted with the best care and spaced 48–60 inches apart, will not fruit without winter chill. If you already have a blackcurrant bush, enjoy it as a leafy shrub, and put your fruit-growing effort into berries that suit the tropics, such as blackberries and tropical fruit. The plant spacing calculator can help you plan the layout.
Soil, spacing, sun and water
Blackcurrants in a suitable climate need full sun and rich, moist, well-drained soil with a pH of 6.0–6.5, and they will not tolerate waterlogged roots. In Zone 12, the soil is not the problem — the climate is. Any bush you do plant should go in rich, well-drained soil with moderate water and a thick mulch, but no soil preparation will make up for the missing winter chill. Save your best soil for fruit that can actually use it.
Companion planting
Good companions for blackcurrants in a suitable climate include borage, marigolds, clover and chives, which attract pollinators and deter soil pests. In Zone 12, those same companions are better used under the fruit that will actually crop for you — blackberries, blueberries and tropical fruit. The companion planting finder can suggest combinations for your whole bed.
Pests and problems
The common pests listed for blackcurrants are aphids, slugs and cutworms. In Zone 12, a blackcurrant bush that never fruits will still attract aphids on young shoots and slugs in wet weather, and humid conditions bring fungal disease — but the real problem is the missing harvest. Grow fruit that suits your climate, and your pest problems will be the ordinary, manageable kind that come with a real crop.
Harvest and storage
Blackcurrants take 1 to 2 years to fruit in a suitable climate, but in Zone 12 there is no harvest to wait for — the bush will not set fruit without a cold winter. If a few berries do appear, pick them when fully black and sweet, but do not plan a harvest around them. The honest harvest from a blackcurrant bush in Zone 12 is leaves, not fruit, and that is not enough to justify the space it takes.
What to grow instead of blackcurrants in Zone 12
If you want dark, tart berries in Zone 12, grow blackberries instead. Low-chill blackberry varieties fruit heavily in the tropics, need no winter chill, and give you buckets of dark berries through the dry season. They grow the same way — a bush on a trellis, in rich, well-drained soil — so you can use the same spot you had planned for blackcurrants.
Mulberries are another excellent tropical choice: the tree grows fast, fruits within a year or two, and gives dark, sweet-tart berries over a long season. Both are far better uses of a Zone 12 garden than a blackcurrant bush waiting for a winter that never comes.
For a related crop, see our guide to when to plant blackberries in Zone 12.
Frequently asked questions
When should I plant blackcurrants in Zone 12?
There is no good time — blackcurrants need a cold winter that Zone 12 cannot provide, so they will not fruit here no matter when you plant them.
Why won't my blackcurrant bush fruit?
Lack of winter chill is the cause. Blackcurrants need a cold winter to break dormancy and set fruit, and Zone 12's winter lows of 50 to 60°F never get cold enough.
Can low-chill blackcurrant varieties work in Zone 12?
No — there is no blackcurrant variety that fruits without a real winter chill. This is one fruit where there is no tropical workaround.
What should I grow instead of blackcurrants?
Blackberries are the best substitute — they fruit heavily in Zone 12 with no winter chill. Mulberries are another excellent tropical choice for dark berries.