Gro 'n Sell
Hypericum
Hypericum berries are a staple of retail and event floral studios nationwide but can be hard to find as plants. I'm excited that Danziger is letting us offer these varieties!
The BRISK™ series is bred for high resistance to rust and root nematodes, two issues that can weaken hypericum. These particular cultivars have been bred by Danziger of Israel for production in frost free equatorial locations. Specialty Cut Flowers (Armitage and Laushman) lists hypericum as hardy zones 5-7, so provide protection as you see fit. We have had plants overwinter here in zone 3, but only under heavy snow cover.
The GLOBO™ series expands the color range available, while maintaining rust and nematode resistance. This series generally has plumper rounder fruits. This series may be allowed to grow naturally to form the usual hypericum stem, or it may be pinched (disbudded) to encourage the side branches to grow and produce a spray type stem. I am looking for more cultural information on this practice.
TWO OF THESE 51-CELL "STRIP TRAYS" TAKE UP THE SPACE OF 1 STANDARD TRAY FOR SHIPPING PURPOSES.
Order 9 or more weeks in advance of desired ship date.
Grown in a 51 cell tray, billed as 50.
Photos courtesy of Danziger
About Tray Sizes
210 and 125 cell trays are full-sized trays, and three of these will fit in a shipping box.
50 cell trays are half-sized trays (unless otherwise noted) and two of these are the equivelent of one full sized tray. Six of these will fit in a shipping box.
18 and 32 cell trays are full sized trays specifically for our vernalized perennials. These have their own set of shipping rules (find details HERE) and cannot be combined with items grown in 210, 125, or 50 cell trays.
Growing Guide
Click here to access our comprehensive growing guides containing everything you need to know about this crop.
This guide is derived and condensed from Danziger's Hypericum Cultivation Description. We highly recommend reading it in its entirety, as it contains essential growing information. Danziger is the breeder of our Gypsophila, Veronica Skyler, Glory Solidago, and Scoop Scabiosa.
| Common Name | Hypericum (aka St. John's Wort) |
| Genus | Hypericum |
| Species | various |
| Family | Clusiaceae / Guttiferae |
| Life Cycle | Can be annual or perennial, shrub or deciduous tree. |
| Format | Plugs |
| Plug Care |
Harden off for the field, or transplant right away into a tunnel. If you cannot transplant, bump up to larger pots. During the first ten days after transplant (establishment stage), overhead irrigation should be used and can be supplemented with drip irrigation and fertilizer.
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| Netting / Staking | Support netting is recommended. 30% shade cloth can be used in summer to protect berries and foliage from discoloration. This may not be necessary. |
| Temperature Range | Ideal temperature range is 75-80F daytime. 55-60F night. They are adaptable outside of this range. |
| Spacing | 9" |
| Soil Preference | Adaptable to various moist well drained soils |
| Day Length | Short days put on vegetative growth; long days initiate flowering. |
| Pinching | Pinching to a minimum of 7-10 internodes from the plant’s base (at least a month after planting), allowing growth of side stems. |
| When to Plant | Late spring or early fall during short days |
| Harvesting | Harvest is carried out when about 80% of the berries on the branch are ripe and colored, and almost all of the flowers have dropped. Cut back to just a couple of inches, to allow them to regrow. |
| Post Harvest Care | Harvest in the early morning before conditions become too hot. Harvest directly into water with solution. Remove all foliage from lower 1/3 of branch. |
| Diseases / Insects | Rust can be an issue in very humid conditions. Nematode gall in roots. |
| Bailey's Notes | Hypericum seems to be hardier and more adaptable than I would have imagined. I have reports of success from Philadelphia to Indiana to Oregon. When it is established you can expect 2 to 3 harvests per season. Just prune it back hard after each harvest and allow to regrow. |
| Resources |
Danziger Hypericum Agricultural Info (scroll down to lower left side of page) |