美国 疯狂大丽花苗圃 Crazy 4 Dahlias – 马里兰耐热大丽花苗圃

苗圃概况

“美国 疯狂大丽花苗圃”（Crazy 4 Dahlias, LLC）由 John Spangenberg 独自拥有并打理，登记地址位于美国马里兰州大马士革镇（Damascus, Maryland），创立于 2002 年。苗圃的口号是 “I’m Crazy 4 Dahlias R U”，主营大丽花块根、球根销售，也做自家育种选育，每年对外发布的目录都会更新当年最新选育品种。

Spangenberg 在大马士革镇的小花园气候对大丽花并不算友好：炎热潮湿的夏季会让很多品种难以成型。从 2002 年开始，他就把选育方向放在”能在马里兰炎热夏天成型、且能在花展上拿得出手的品种”——苗圃试验的逻辑是”如果能在我这里表现好，那它去绝大多数地方都应该表现不差”。这一方向贯穿了他 18 年的种植与展示生涯。

育种方向与协会任职

苗圃每年大约种 800 株大丽花，其中 95% 是冲着花展去的展示品种。Spangenberg 是美国大丽花协会（American Dahlia Society, ADS）的认证高级评审员（Senior Judge），同时担任 ADS 分类委员会（Classification Committee）成员，并被任命为美国大丽花协会大西洋中部试验花园（Mid-Atlantic Trial Garden）的主任——这是 ADS 全美试验花园网络下设立在大西洋中部区域的官方测试点，负责对全美育种者推出的新品种做实地打分，决定哪些有资格进 ADS 出版的全美年度新品种榜单。

Spangenberg 也同时是 National Capital Dahlia Society（国家首都大丽花协会，简称 NCDS）的成员。该协会总部位于华盛顿特区都会区，覆盖马里兰、弗吉尼亚、华盛顿特区一带的大丽花爱好者与花展玩家。NCDS 与 Crazy 4 Dahlias 之间关系紧密，Spangenberg 同时在两个组织里承担评审、分类、试种三方面的工作。

代表品种与 2026 年目录

苗圃发布的目录里大量品种来自外源育种者，自己选育的品种比例反而小——这是大多数美国大丽花苗圃的共同模式，区别在于哪些品种能被选进 Spangenberg 的展示清单。2026 年目录 5 月 1 日起陆续发货，14 个新品种里最重磅的是来自 Rich Gibson 的 “20th Ave Eyes”（BB 规格，白底紫心，获当年 ADS Lynn B. Dudley 勋章 BB 组最高分）、”20th Ave Sangre”（M 规格，天鹅绒深红，同年 Dudley M 组最高分），来自 Bob Romano 的 “Windhaven Puff”（B 规格，深粉裂瓣，复瓣密集）与 “Windhaven Bob”（BB 规格，深红裂瓣），以及 Ted and Margaret Kennedy 选育的”霍莉山”（Hollyhill）系列六个品种——”Dutchess”、”Sugar Baby”、”Cheerio”、”Little Moon”、”Royal”、”Rose Red 2″、”Calypso”。

自家选育最早可追溯到 2014 年登录的 “Crazy 4 Wes”（单瓣小花，Spangenberg 选育），后续又有 “Crazy Smalls”、”Crazy 4 Chris”（迷你球，2016 年获 ADS Derrill W. Hart 奖章）。2026 年目录第一个自家品种是 “Crazy 4 Fluffy”（BB 规格，粉色裂瓣，凉爽天气下花心会变白）。来源：苗圃官方目录 crazy4dahlias.com 上 2026 Introductions 页面逐项核对，匹配 ADS（dahlia.org）发布的 2022、2023 年新品种 PDF。

健康保证与病毒筛查

Spangenberg 从 2015 年开始和美国大丽花协会合作做 ADS 病毒抽样检测，专项经费由 Scheetz Chuey Charitable Foundation 通过 ADS 捐赠机制提供。每个季度，苗圃都会把留种母株的叶片寄去 ADS 实验室做 PCR 检测，检出阳性的品系直接销毁——不会因为当年表现好就保留。阴性品系再分株扩繁，作为下一年商品块根的母本。这一方针让 Crazy 4 Dahlias 销售的块根连续多年在花友圈口碑稳定。

日常操作上，苗圃每一把剪枝刀在不同植株之间都会消毒一次，避免汁液接触传染——这是大丽花病毒传播的主要途径。切花剪枝、压苗、除侧芽、打顶所有工具都用漂白水溶液轮换。这一套在花展圈不算新鲜，但对一家小规模家庭苗圃能长期坚持并不容易。

经销渠道与媒体曝光

苗圃采用”按目录时段集中发货”模式，块根每年四月中下旬补货一次，下单后苗圃按订单先后凑齐发货。同一个买家下多个订单时，苗圃会合并发货，但每个订单会收 3 美元合并手续费——这一点在结算页写得很清楚。买家收到块根后 7 天内必须开箱检查，有问题直接联系苗圃处理；超过 7 天苗圃不再受理因种植条件、气候、虫害、操作失误引起的任何问题。支持美元、加元、澳元、瑞郎、英镑、欧元六种货币结算，发货默认美国境内，出口订单按目的国邮政与海关要求走。苗圃在 Instagram（@crazy4dahlias）与 Facebook（/crazy4dahlias）两个社交账号上同步发布新品种开售消息。

苗圃被《华盛顿邮报》（Washington Post）两次专题报道：第一次是 2014 年 10 月 1 日，记者 Adrian Higgins 在园艺版写了大丽花热潮的复兴故事，Crazy 4 Dahlias 是文中重点走访的小型苗圃之一；第二次是 2018 年 10 月 9 日，同一位记者跟进报道大丽花在美东家庭园艺里的第二春。两篇报道把 Spangenberg 的”炎热气候选育路线”介绍给华盛顿都会区的家庭园艺读者。

2026 年动向：苗圃 4 月 17 日晚 8 点重新补货，4 月起每周在 Instagram @crazy4dahlias 发新品种长势更新，Facebook /crazy4dahlias 同步。Spangenberg 继续担任 ADS 分类委员会、大西洋中部试验花园主任，他同时在 NCDS 里做评审员，是大华盛顿都会区大丽花花友圈的核心人物之一。苗圃不会扩成大公司，”小而专”是 Crazy 4 Dahlias 长期以来的定位。

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Nursery Overview

Crazy 4 Dahlias, LLC is owned and operated by John Spangenberg, located in Damascus, Maryland, USA, founded in 2002. The nursery’s tagline is “I’m Crazy 4 Dahlias R U”. It sells dahlia tubers online, runs its own breeding line, and releases a yearly catalog of new introductions.

The small garden in Damascus is not the most hospitable place for dahlias: hot and humid Maryland summers knock out many varieties. Since 2002, Spangenberg has focused on selecting dahlia that hold their shape in heat and can win at the show bench. The logic is straightforward — if a variety performs here, it should perform almost anywhere else. That direction has run through his 18 years of growing and exhibiting.

Breeding Focus and Society Roles

The nursery grows roughly 800 dahlia plants each year, and 95% of them are show varieties. Spangenberg is a Senior Judge of the American Dahlia Society (ADS), a member of the ADS Classification Committee, and serves as Director of the ADS Mid-Atlantic Trial Garden — the official ADS test site for the mid-Atlantic region that scores new introductions and decides which varieties make the ADS national introduction list.

Spangenberg is also a member of the National Capital Dahlia Society (NCDS), based in the Washington DC metro area and serving Maryland, Virginia and DC dahlia growers. Crazy 4 Dahlias and NCDS are closely linked — Spangenberg judges, classifies, and trial-garden-tests in both organizations.

Varieties and 2026 Catalog

The Crazy 4 Dahlias catalog carries many outside-bred cultivars, with relatively few self-bred lines — typical of small US dahlia nurseries. The difference is which varieties make Spangenberg’s show list. The 2026 catalog started going out from May 1, with 14 new introductions. The headliners are Rich Gibson’s “20th Ave Eyes” (BB, white with lavender center, 2026 ADS Lynn B. Dudley Medal BB division winner), “20th Ave Sangre” (M, velvety dark red, same Dudley M winner); Bob Romano’s “Windhaven Puff” (B, dark pink blend laciniated, dense petals) and “Windhaven Bob” (BB, dark red laciniated); plus six Hollyhill cultivars from Ted and Margaret Kennedy — “Dutchess”, “Sugar Baby”, “Cheerio”, “Little Moon”, “Royal”, “Rose Red 2” and “Calypso”.

Self-bred lines go back to 2014’s “Crazy 4 Wes” (single floret, Spangenberg-bred), later “Crazy Smalls” and “Crazy 4 Chris” (pompon, 2016 ADS Derrill W. Hart Medal). The 2026 catalog’s first self-bred release is “Crazy 4 Fluffy” (BB, pink laciniated, white center in cooler weather). Source: cross-checked against the crazy4dahlias.com 2026 Introductions page and ADS New Introductions PDFs (2022, 2023).

Health and Virus Testing

Spangenberg started ADS virus sample testing in 2015 with funding from the Scheetz Chuey Charitable Foundation through the ADS endowment. Each quarter, mother-stock leaves go to the ADS lab for PCR testing; any positive line is destroyed on the spot — no exception for a good show year. Clean lines are split and propagated as commercial mother-stock for the next season. This protocol has kept Crazy 4 Dahlias tubers consistently well-regarded among US dahlia growers.

Day-to-day, every pair of pruning shears is disinfected between plants to avoid sap-transmitted virus — the main dahlia virus pathway. Cutting, pinching, disbudding, topping — all tools rotate through a bleach solution. This is standard in the show-bench community, but hard for a small home nursery to keep up year after year.

Sales, Shipping and Press

The nursery uses a “restock window” sales model: tubers are restocked once in mid-to-late April, then orders ship in sequence. The nursery combines multiple orders from the same buyer for shipping, but charges a $3 handling fee per order — clearly stated at the payment step. Buyers must open and inspect on arrival and email within 7 days for any concerns; after 7 days the nursery does not cover issues from growing conditions, weather, pests, or operator error. Six currencies supported: USD, CAD, AUD, CHF, GBP, EUR. Default destination is US domestic; export orders go via destination-post and customs. The nursery posts restock and variety updates on Instagram (@crazy4dahlias) and Facebook (/crazy4dahlias).

The Washington Post ran two feature stories on Crazy 4 Dahlias: first on October 1, 2014, by Adrian Higgins in the garden section, profiling the dahlia revival and featuring Crazy 4 Dahlias as one of the small nurseries highlighted; second on October 9, 2018, by the same reporter, following up on dahlia’s second spring in US East Coast home gardens. Both pieces introduced Spangenberg’s hot-climate breeding focus to Washington-metro home gardeners.

2026 update: the nursery restocked on April 17, 2026 at 8:00 PM, the year’s first restock window. Starting in April the nursery posts weekly growth updates on Instagram @crazy4dahlias, mirrored on Facebook /crazy4dahlias. Spangenberg continues as ADS Classification Committee member and Mid-Atlantic Trial Garden Director, also serving as judge in NCDS, one of the central people in the Greater Washington dahlia community. The nursery has no plans to grow into a large operation — “small and focused” is how Crazy 4 Dahlias has been understood for years.