Gadenin日本語Get the appThe shape of the freesia year
Freesia runs on a cool growing season followed by a warm dry rest, which is the reverse of the pattern most gardeners are used to. It comes from a climate with wet cool winters and hot dry summers, and every problem people have with it traces back to trying to run it on the wrong half of the year. Read the table below as a sequence of stages rather than months, because where you are and how cold your winter is decides when each stage falls.
| Stage | Roughly how long | What you do | The decision that matters |
|---|---|---|---|
| Planting | 1 week | Corms 2 in (5 cm) deep and 2 in (5 cm) apart in gritty mix, one soak | Have you got 8-10 weeks of cool nights ahead |
| Emergence | 2-4 weeks | Water sparingly, keep bright and cool, put supports in | Bright enough, or will the shoots stretch |
| Growing on | 6-10 weeks | Water when the top inch (2.5 cm) dries, high-potassium feed fortnightly | Nights staying below 60F (15C) |
| Bud to flower | 3-5 weeks | Keep evenly moist, keep cool to extend the display, cut for the vase | Warm indoors for the scent, or cool for length |
| After flowering | 4-6 weeks | Remove spikes, keep feeding and watering while the leaves are green | Resisting the urge to tidy the foliage away |
| Drying off | 3-4 weeks | Reduce water as leaves yellow, then stop entirely | Following the leaves, not the calendar |
| Dormant rest | 2-3 months | Lift or leave, store warm and dry at 70-80F (21-27C) | Warm and dry, not cool and damp |
Fitting it to your own climate
In a mild climate with frost-free winters, freesia fits the natural calendar exactly. Plant in autumn, let it grow through the cool wet season outdoors, flower in spring and rest through the dry heat of summer. Corms can be left in the ground and will build up into clumps over several years.
In a climate with real winter frost, the plant cannot be outside through its growing period, so the season shifts. Plant in late winter or early spring somewhere frost-free but genuinely unheated, grow it cool under cover, move it outdoors once frost has passed, flower in early summer and rest through late summer. This is the version most people are actually running, and its whole difficulty is finding a bright frost-free space that stays cold.
In either case the corms can also be started in batches a few weeks apart to spread the flowering, which works well because the sequence from emergence to flower is fairly predictable at around ten to fourteen weeks.
The four decisions that decide the season
Freesia is not a demanding plant week to week. It is a plant with a small number of decisions that carry enormous weight, and almost every outcome traces back to one of these four.
- Where the pot stands for the first ten weeks Cool nights below 60F (15C) and full light. This decides whether there are flowers at all, and it is decided before you can see anything. Nothing done later compensates for getting it wrong.
- Whether the support goes in early Twigs or a cane ring pushed in while the shoots are short. Put in later, it is a repair rather than a support, and the stems keep the bend they had when you tied them.
- Whether you keep feeding after the flowers finish Four to six weeks of high-potassium feed and normal watering while the leaves stay green. This decides the size of next year's corm and therefore next year's flowers.
- How the corms are stored Warm, dry and airy for two to three months. Cool damp storage produces uneven emergence and weak flowering that looks like a fault in the corms themselves.
Three of these four are temperature decisions and none of them cost money. Freesia is much less about technique than about finding two places: somewhere cold and bright for the spring, and somewhere warm and dry for the summer.
The records that turn this into your own calendar
The general calendar above is only a frame. What makes it useful is a season's own dates written against it: planting date, emergence date, first flower, last flower, the date the leaves finished, and where the pot stood at each stage. After two years those dates let you plan backward, so you can plant knowing roughly when it will flower rather than hoping.
Add the two counts that measure success: how many corms flowered out of how many planted, and how many flowering-size corms came back at the end. A season that returns more good corms than it started with is one you can repeat indefinitely, and that is the real goal with freesia. One that returns fewer tells you the problem is in the weeks after flowering, which is the easiest part of the whole year to fix.